The TPS6124x device is a highly efficient synchronous step-up DC-DC converter optimized for products powered by either a three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-Polymer battery. The TPS6124x supports output currents up to 450 mA. The TPS61240 has an input valley current limit of 500 mA, and the TPS61241 has an input valley current of 600 mA.
With an input voltage range of 2.3 V to 5.5 V, the device supports batteries with extended voltage range and are ideal to power portable applications like mobile phones and other portable equipment. The TPS6124x boost converter is based on a quasi-constant on-time valley current mode control scheme.
The TPS6124x presents a high impedance at the VOUT pin when shut down. This allows for use in applications that require the regulated output bus to be driven by another supply while the TPS6124x is shut down.
During light loads the device will automatically pulse skip allowing maximum efficiency at lowest quiescent currents. In the shutdown mode, the current consumption is reduced to less than 1 μA.
TPS6124x allows the use of small inductors and capacitors to achieve a small solution size. During shutdown, the load is completely disconnected from the battery. The TPS6124x is available in a 6-pin DSBGA and 2-mm × 2-mm WSON package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS61240 | WSON (6) | 2.00 mm × 2.00 mm |
DSBGA (6) | 1.25 mm × 0.86 mm | |
TPS61241 | DSBGA (6) | 1.25 mm × 0.86 mm |
Changes from C Revision (December 2014) to D Revision
Changes from B Revision (February 2012) to C Revision
PART NUMBER(1) | OUTPUT VOLTAGE |
DEVICE SPECIFIC FEATURES |
---|---|---|
TPS61240 | 5 V | Supports 5 V, up to 250 mA loading down to 3.2 V input voltage |
Supports 5 V, up to 250 mA loading down to 3.2 V input voltage | ||
TPS61241 | Supports 5 V, up to 300 mA loading down to 3.2 V input voltage | |
TPS61242(2) | Optimized to drive an inductive load |
PIN | I/O | DESCRIPTION | REMARKS | ||
---|---|---|---|---|---|
NAME | WSON | DSGBA | |||
EN | 4 | C1 | I | Enable | Positive polarity. Low = IC shutdown. |
FB | 3 | C2 | I | Feedback input | Feedback for regulation. |
GND | 1 | A2 | — | Ground | Power ground and IC ground |
L | 5 | B1 | I | Boost and rectifying switch input | Inductor connection to FETs |
VIN | 6 | A1 | I | Supply voltage | Supply from battery |
VOUT | 2 | B2 | O | Output | Connected to load |
MIN | MAX | UNIT | ||
---|---|---|---|---|
VI | Input voltage on VIN, L, EN | –0.3 | 7 | V |
Voltage on VOUT | –2.0 | 7 | V | |
Voltage on FB | –2.0 | 14 | V | |
Peak output current | Internally limited | A | ||
TJ | Maximum operating junction temperature | –40 | 125 | °C |
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge(2) | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±4000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±500 | |||
Machine model (MM) | ±200 |
MIN | NOM | MAX | UNIT | |||
---|---|---|---|---|---|---|
VIN | Input voltage range | 2.3 | 5.5 | V | ||
L | Inductance | 0.4 | 1 | 1.5 | µH | |
CO | Output capacitance | TPS61240 TPS61241 |
1 | 20 | µF | |
TPS61242 | 0.8 | 10 | µF | |||
TA | Operating ambient temperature | –40 | 85 | °C | ||
TJ | Operating junction temperature | –40 | 125 |
THERMAL METRIC(1) | TPS6124x | UNIT | ||
---|---|---|---|---|
YFF | DRV | |||
6 PINS | 6 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 132.7 | 104.1 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 1.2 | 97.1 | |
RθJB | Junction-to-board thermal resistance | 22.4 | 74.0 | |
ψJT | Junction-to-top characterization parameter | 5.2 | 4.5 | |
ψJB | Junction-to-board characterization parameter | 22.4 | 74.4 | |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | — | 48.4 |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
DC-DC STAGE | ||||||
VIN | Input voltage range | 2.3 | 5.5 | V | ||
VOUT | Fixed output voltage range | 2.3 V ≤ VIN ≤ 5.5 V, 0 mA ≤ IOUT ≤ 200 mA | 4.9 | 5.0 | 5.1 | V |
VO_Ripple | Ripple voltage, PWM mode | ILOAD = 150 mA | 20 | mVpp | ||
ISW | Output current | VIN 2.3 V to 5.5 V | 200 | mA | ||
Switch valley current limit | VOUT = VGS = 5.0 V (TPS61240) | 500 | 600 | mA | ||
VOUT = VGS = 5.0 V (TPS61241, TPS61242) | 600 | 700 | ||||
Short circuit current | VOUT = VGS = 5.0 V | 200 | 350 | mApk | ||
High side MOSFET on-resistance(1) | VIN = VGS = 5.0 V, TA = 25°C(1) | 290 | mΩ | |||
Low Side MOSFET on-resistance(1) | VIN = VGS = 5.0 V, TA = 25°C (1) | 250 | mΩ | |||
Operating quiescent current | IOUT = 0 mA, Power save mode | 30 | 40 | μA | ||
Shutdown current | EN = GND | 1.5 | μA | |||
Reverse leakage current VOUT | EN = 0, VOUT = 5 V | 2.5 | μA | |||
Leakage current from battery to VOUT | EN = GND | 2.5 | μA | |||
Line transient response | VIN 600 mVp-p AC square wave, 200 Hz, 12.5% DC at 50/200 mA load |
±25 | ±50 | mVpk | ||
Load transient response | 0–50 mA, 50–0 mA VIN = 3.6V TRise = TFall = 0.1 μs | 50 | mVpk | |||
50–200 mA, 200–50 mA, VIN = 3.6 V, TRise = TFall = 0.1 μs | 150 | |||||
IIN | Input bias current, EN | EN = GND or VIN | 0.01 | 1.0 | μA | |
VUVLO | Undervoltage lockout threshold | Falling | 2.0 | 2.1 | V | |
Rising | 2.1 | 2.2 | V | |||
CONTROL STAGE | ||||||
VIH | High level input voltage threshold, EN | 2.3 V ≤ VIN ≤ 5.5 V | 1.0 | V | ||
VIL | Low level input voltage threshold, EN | 2.3 V ≤ VIN ≤ 5.5 V | 0.4 | V | ||
OVC | Input overvoltage threshold | Falling | 5.9 | V | ||
Rising | 6.0 | |||||
tStart | Start-up time | Time from active EN to start switching, no-load until VOUT is stable 5 V | 300 | μs | ||
DC-DC STAGE | ||||||
ƒ | See Figure 7 (Frequency Dependancy vs IOUT) | 3.5 | MHz | |||
TSD | Thermal shutdown | Increasing junction temperature | 140 | °C | ||
Thermal shutdown hysteresis | Decreasing junction temperature | 20 | °C |
Figure | ||
---|---|---|
Maximum Output Current | vs Input Voltage | Figure 1 |
Efficiency | vs Output Current, Vout = 5V, Vin = [2.3 V; 3.0 V; 3.6 V; 4.2 V] | Figure 2 |
vs Input Voltage, Vout = 5 V, Iout = [100 µA; 1 mA; 10 mA; 100 mA; 200 mA] | Figure 3 | |
Input Current | at No Output Load, Device Disabled | Figure 4 |
Output Voltage | vs Output Current, Vout = 5 V, Vin = [2.3 V; 3.0 V; 3.6 V; 4.2 V] | Figure 5 |
vs Input Voltage | Figure 6 | |
Frequency | vs Output Load, Vout = 5 V, Vin = [3.0 V; 4.0 V; 5.0 V] | Figure 7 |