The TPS6273x family provides a highly integrated ultra low power buck converter solution that is well suited for meeting the special needs of ultra-low power applications such as energy harvesting. The TPS6273x provides the system with an externally programmable regulated supply to preserve the overall efficiency of the power-management stage compared to a linear step-down converter. This regulator is intended to step-down the voltage from an energy storage element such as a battery or super capacitor to supply the rail to low-voltage electronics. The regulated output has been optimized to provide high efficiency across low-output currents (<10 µA) to high currents (200 mA).
The TPS6273x integrates an optimized hysteretic controller for low-power applications. The internal circuitry uses a time-based sampling system to reduce the average quiescent current.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS6273x | VQFN (14) | 3.50 mm × 3.50 mm |
Changes from B Revision (July 2013) to C Revision
Changes from A Revision (March 2013) to B Revision
Changes from * Revision (October 2012) to A Revision
To further assist users in the strict management of their energy budgets, the TPS6273x toggles the input power-good indicator to signal an attached microprocessor when the voltage on the input supply has dropped below a preset critical level. This signal is intended to trigger the reduction of load currents to prevent the system from entering an undervoltage condition. In addition, independent enable signals allow the system to control whether the converter is regulating the output, monitoring only the input voltage, or to shut down in an ultra-low quiescent sleep state.
The input power-good threshold and output regulator levels are programmed independently through external resistors.
All the capabilities of TPS6273x are packed into a small footprint 14-lead 3.5-mm × 3.5-mm QFN package (RGY).
PIN | DESCRIPTION | |||
---|---|---|---|---|
NAME | TPS62736 RGY |
TPS62737 RGY |
TYPE | |
EN1 | 5 | 5 | Input | Digital input for chip enable, standby, and ship-mode. EN1 = 1 sets ship mode independent of EN2. EN1=0, EN2 = 0 disables the buck converter and sets standby mode. EN1=0, EN2=1 enables the buck converter. Do not leave either pin floating. |
EN2 | 6 | 6 | Input | |
IN | 1 | 1 | Input | Input supply to the buck regulator |
NC | 2, 3, 4, 14 | 4, 14 | Input | Connect to VSS |
OUT | 11 | 11 | Output | Step down (buck) regulator output |
SW | 13 | 2, 13 | Input | Inductor connection to switching node |
Thermal Pad | 15 | 15 | Input | Connect to VSS |
VIN_OK | 10 | 10 | Output | Push-pull digital output for power-good indicator for the input voltage. Pulled up to VIN pin. |
VIN_OK_SET | 8 | 8 | Input | Resistor divider input for VIN_OK threshold. Pull to VIN to disable. Do not leave pin floating. |
VOUT_SET | 9 | 9 | Input | Resistor divider input for VOUT regulation level |
VRDIV | 7 | 7 | Output | Resistor divider biasing voltage |
VSS | 12 | 3, 12 | Input | Ground connection for the device |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
Pin voltage | Input voltage range on IN, EN1, EN2, VRDIV, VIN_OK_SET, VOUT_SET, VIN_OK, OUT, SW,NC | –0.3 | 5.5 | V | |
TPS62736 | Peak currents | IN, OUT | 100 | mA | |
TPS62737 | Peak currents | IN, OUT | 370 | mA | |
TJ | Temperature range | Operating junction temperature range | –40 | 125 | °C |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
Tstg | Storage temperature range | –65 | 150 | °C | |
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) | -1 | 1 | kV |
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) | -500 | 500 | V | ||
Machine Model (MM) | -150 | 150 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
IN | IN voltage range | 2 | 5.5 | V | |
CIN | TPS62736 Input Capacitance | 4.7 | μF | ||
TPS62737 Input Capacitance | 22 | ||||
COUT | Output Capacitance | 10 | 22 | μF | |
R1 + R2 + R3 |
Total Resistance for setting reference voltage | 13 | MΩ | ||
LBUCK | TPS62736 Inductance | 4.7 | 10 | μH | |
TPS62737 Inductance | 10 | ||||
TA | TPS62736 Operating free air ambient temperature | –40 | 85 | °C | |
TPS62737 Operating free air ambient temperature | –20 | 85 | |||
TJ | Operating junction temperature | –40 | 105 | °C |
THERMAL METRIC(1) | TPS6273x | UNIT | |
---|---|---|---|
RGY | |||
14 PINS | |||
θJA | Junction-to-ambient thermal resistance | 33.7 | °C/W |
θJCtop | Junction-to-case (top) thermal resistance | 37.6 | |
θJB | Junction-to-board thermal resistance | 10.1 | |
ψJT | Junction-to-top characterization parameter | 0.4 | |
ψJB | Junction-to-board characterization parameter | 10.3 | |
θJCbot | Junction-to-case (bottom) thermal resistance | 2.9 |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
QUIESCENT CURRENTS | ||||||
IQ | TPS62736 Buck enabled state (EN1 = 0, EN2 = 1) |
VIN = 2 V, No load on VOUT | 380 | 550 | nA | |
TPS62736 Buck disabled VIN_OK active state (EN1 = 0, EN2 = 0) |
340 | 520 | ||||
TPS62736 Ship mode state (EN1 = 1, EN2 = x) | 10 | 65 | ||||
TPS62737 Buck enabled state (EN1 = 0, EN2 = 1) |
375 | 600 | nA | |||
TPS62737 Buck disabled VIN_OK active state (EN1 = 0, EN2 = 0) |
345 | 560 | ||||
TPS62737 Ship mode state (EN1 = 1, EN2 = x) | 11 | 45 | ||||
OUTPUT | ||||||
VBIAS | Output regulation reference | 1.205 | 1.21 | 1.217 | V | |
VOUT | TPS62736 Output regulation (Spec does not include the resistor accuracy error) | IOUT = 10 mA; 1.3 V < VOUT < 3.3 V |
–2% | 0% | 2% | |
TPS62737 Output regulation (Spec does not include the resistor accuracy error) | IOUT = 100 mA; 1.3 V < VOUT < 3.3 V; |
–2% | 0% | 2% | ||
TPS62736 Output line regulation | IOUT = 100 µA; VIN = 2.4 V to 5.5 V |
0.01 | %/V | |||
TPS62737 Output line regulation | IOUT = 10 mA; VIN = 2.3 V to 5.5 V |
0.31 | ||||
TPS62736 Output load regulation | IOUT = 100 µA to 50 mA, VIN = 2.2 V |
0.01 | %/mA | |||
TPS62737 Output load regulation | IOUT = 100 µA to 200 mA, VIN = 2.2 V; –20°C < TA < 85°C |
0.01 | %/mA | |||
TPS62736 Output ripple | VIN = 4.2V, IOUT = 1 mA, COUT = 22 μF |
20 | mVpp | |||
TPS62737 Output ripple | VIN = 4.2 V, IOUT = 1 mA, COUT = 22 μF |
40 | mVpp | |||
Programmable voltage range for output voltage threshold | IOUT = 10 mA | 1.3 | VIN – 0.2 | V | ||
VDO | TPS62736 Drop-out-voltage when VIN is less than VOUT(SET) | VIN = 2.1 V, VOUT(SET) = 2.5 V, IOUT = 10 mA, 100% duty cycle |
24 | 30 | mV | |
TPS62737 Drop-out-voltage when VIN is less than VOUT(SET) | VIN = 2.1 V, VOUT(SET) = 2.5 V, IOUT = 100 mA, 100% duty cycle |
180 | 220 | mV | ||
tSTART-STBY | Startup time with EN1 low and EN2 transition to high (Standby Mode) | TPS62736, COUT = 22 µF | 400 | μs | ||
TPS62737, COUT = 22 µF | 300 | μs | ||||
tSTART-SHIP | Startup time with EN2 high and EN1 transition from high to low (Ship Mode) | COUT = 22 µF | 100 | ms | ||
POWER SWITCH | ||||||
RDS(on) | TPS62736 High-side switch ON resistance | VIN = 3 V | 2.4 | 3 | Ω | |
TPS62736 Low-side switch ON resistance | VIN = 3 V | 1.1 | 1.5 | Ω | ||
TPS62737 High-side switch ON resistance | VIN = 2.1 V | 1.8 | 2.2 | Ω | ||
TPS62737 Low-side switch ON resistance | VIN = 2.1 V | 0.9 | 1.3 | Ω | ||
ILIM | TPS62736 Cycle-by-cycle current limit | 2.4 V < VIN < 5.25 V; 1.3 V < VOUT < 3.3 V |
68 | 86 | 100 | mA |
TPS62737 Cycle-by-cycle current limit | 2.4 V < VIN < 5.25 V; 1.3 V < VOUT < 3.3 V; –20°C < TA < 85°C |
295 | 340 | 370 | mA | |
fSW | Max switching frequency | 2 | MHz | |||
INPUT | ||||||
VIN-UVLO | Input under voltage protection | VIN falling | 1.91 | 1.95 | 2 | V |
VIN-OK | Input power-good programmable voltage range | 2 | 5.5 | V | ||
VIN-OK-ACC | TPS62736 Accuracy of VIN-OK setting | VIN increasing | –2% | 2% | ||
TPS62737 Accuracy of VIN-OK setting | –3% | 3% | ||||
VIN-OK-HYS | Fixed hysteresis on VIN_OK threshold, OK_HYST | VIN increasing | 40 | mV | ||
VIN_OK-OH | VIN-OK output high threshold voltage | Load = 10 µA | VIN – 0.2 | V | ||
VIN_OK-OL | VIN-OK output low threshold voltage | 0.1 | V | |||
EN1 and EN2 | ||||||
VIH | Voltage for EN High setting. Relative to VIN | VIN = 4.2 V | VIN – 0.2 | V | ||
VIL | Voltage for EN Low setting | 0.2 | V |
Unless otherwise noted, graphs were taken using Figure 62 with L = Toko 10 µH DFE252012C | FIGURE | ||
---|---|---|---|
η | VO = 2.5 V Efficiency | vs Output Current | Figure 1 |
vs Input Voltage | Figure 2 | ||
VO = 1.8 V Efficiency | vs Output Current | Figure 3 | |
vs Input Voltage | Figure 4 | ||
VO = 1.3 V Efficiency | vs Output Current | Figure 5 | |
vs Input Voltage | Figure 6 | ||
VOUT (DC) | VO = 2.5 V | vs Output Current | Figure 7 |
vs Input Voltage | Figure 8 | ||
vs Temperature | Figure 9 | ||
VO = 1.8 V | vs Output Current | Figure 10 | |
vs Input Voltage | Figure 11 | ||
vs Temperature | Figure 12 | ||
VO = 1.3 V | vs Output Current | Figure 13 | |
vs Input Voltage | Figure 14 | ||
vs Temperature | Figure 15 | ||
IOUT MAX (DC) | VO = 2.5 V | vs Input Voltage | Figure 16 |
VO = 1.8 V | Figure 17 | ||
VO = 1.3 V | Figure 18 | ||
Input IQ | EN1 = 1, EN2 = 0 (Ship Mode) | vs Input Voltage | Figure 19 |
EN1 = 0, EN2 = 0 (Standby Mode) | Figure 20 | ||
EN1 = 0, EN2 = 1 (Active Mode) | Figure 21 | ||
Switching Frequency | VO = 2.5 V | vs Output Current | Figure 23 |
vs Input Voltage | Figure 24 | ||
Output Ripple | VO = 2.5 V | vs Output Current | Figure 25 |
vs Input Voltage | Figure 26 |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
VOUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = open; EN1 = high; EN2 = x | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as voltage source > VOUT to prevent switching | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Scope probe with small ground lead used to measure ripple across COUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = open; EN1 = EN2 = low | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as voltage source > VOUT to prevent switching | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Scope probe with small ground lead used to measure ripple across COUT |
Unless otherwise noted, graphs were taken using Figure 52 with L = Toko 10 µH DFE252012C | FIGURE | ||
---|---|---|---|
η | VO = 2.5 V Efficiency | vs Output Current | Figure 27 |
vs Input Voltage | Figure 28 | ||
VO = 1.8 V Efficiency | vs Output Current | Figure 29 | |
vs Input Voltage | Figure 30 | ||
VO = 1.3 V Efficiency | vs Output Current | Figure 31 | |
vs Input Voltage | Figure 32 | ||
VOUT (DC) | VO = 2.5 V | vs Output Current | Figure 33 |
vs Input Voltage | Figure 33 | ||
vs Temperature | Figure 35 | ||
VO = 1.8 V | vs Output Current | Figure 36 | |
vs Input Voltage | Figure 37 | ||
vs Temperature | Figure 38 | ||
VO = 1.3 V | vs Output Current | Figure 39 | |
vs Input Voltage | Figure 40 | ||
vs Temperature | Figure 41 | ||
IOUT MAX (DC) | VO = 2.5 V | vs Input Voltage | Figure 42 |
VO = 1.8 V | Figure 43 | ||
VO = 1.3 V | Figure 44 | ||
Input IQ | EN1 = 1, EN2 = 0 (Ship Mode) | vs Input Voltage | Figure 45 |
EN1 = 0, EN2 = 0 (Standby Mode) | Figure 46 | ||
EN1 = 0, EN2 = 1 (Active Mode) | Figure 47 | ||
Switching Frequency | VO = 1.8 V | vs Output Current | Figure 48 |
vs Input Voltage | Figure 49 | ||
Output Ripple | VO = 1.8 V | vs Output Current | Figure 51 |
vs Input Voltage | Figure 51 |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = open; EN1 = high; EN2 = x | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as voltage source > VOUT to prevent switching | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Scope probe with small ground lead used to measure ripple across COUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = sourcemeter configured as current source to increasingly sink current until V(OUT) < VOUT - 100 mV | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source and measuring current | ||
OUT = open; EN1 = EN2 = low | ||
Thermal stream provided temperature variation |
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
IN = Sourcemeter configured as voltage source | ||
OUT = sourcemeter configured as current source to sink current and VCOMP > VOUT | ||
Scope probe with small ground lead used to measure ripple across COUT |