The TPS6224x device is a highly efficient synchronous step-down DC-DC converter. The device provides up to 300-mA output current from a single Li-Ion cell and is ideal for battery powered portable applications like mobile phones and other portable equipment.
With an wide input voltage range of 2 V to 6 V, the device also supports two- and three-cell alkaline, 3.3-V and 5-V input voltage rails.
The TPS6224x operates at 2.25-MHz fixed switching frequency and enters power save mode operation at light load currents to maintain high efficiency over the entire load current range.
The power save mode is optimized for low output voltage ripple. For low-noise applications, the device can be forced into fixed-frequency pulse width modulation (PWM) mode by pulling the MODE pin high. In shutdown mode, the current consumption is reduced to less than 1 μA. The TPS6224x allows the use of small inductors and capacitors to achieve a small solution size.
The TPS6224x operates over a free-air temperature range of –40°C to 85°C. The device is available in a 5-pin SOT and a 6-pin 2-mm × 2-mm WSON package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS6224x | WSON (6) | 2.00 mm × 2.00 mm |
SOT (5) | 2.90 mm × 1.60 mm |
Changes from B Revision (September 2007) to C Revision
PART NUMBER (1) | OUTPUT VOLTAGE(2) |
---|---|
TPS62240 | adjustable |
TPS62240 | adjustable |
TPS62242 | 1.2 V fixed output voltage |
TPS62243 | 1.8 V fixed output voltage |
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | WSON | SOT | ||
EN | 4 | 3 | I | This is the enable pin of the device. Pulling this pin to low forces the device into shutdown mode. Pulling this pin to high enables the device. This pin must be terminated. |
GND | 6 | 2 | PWR | GND supply pin. |
FB | 3 | 4 | I | Feedback pin for the internal regulation loop. Connect the external resistor divider to this pin. In case of fixed output voltage option, connect this pin directly to the output capacitor. |
MODE | 2 | — | I | This pin is only available at WSON package option. MODE pin = High forces the device to operate in fixed-frequency PWM mode. MODE pin = Low enables the power save mode with automatic transition from PFM mode to fixed-frequency PWM mode. |
SW | 1 | 5 | O | This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this terminal. |
VIN | 5 | 1 | PWR | VIN power supply pin. |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VIN | Input voltage (2) | –0.3 | 7 | V | |
Voltage at EN, MODE | –0.3 | VIN +0.3, ≤7 | V | ||
Voltage on SW | –0.3 | 7 | 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(3) | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) | ±2000 | V |
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) | ±1000 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
VIN | Supply voltage, VIN | 2 | 6 | V | |
Output voltage for adjustable voltage | 0.6 | VIN | V | ||
TA | Operating ambient temperature | –40 | 85 | °C | |
TJ | Operating junction temperature | –40 | 125 | °C |
THERMAL METRIC(1) | TPS6224x | UNIT | ||
---|---|---|---|---|
DRV [WSON] | DDC [SOT] | |||
6 PINS | 5 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 67.8 | 226.9 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 88.5 | 40.7 | °C/W |
RθJB | Junction-to-board thermal resistance | 37.2 | 48.8 | °C/W |
ψJT | Junction-to-top characterization parameter | 2.0 | 0.5 | °C/W |
ψJB | Junction-to-board characterization parameter | 37.6 | 48.1 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | 7.9 | N/A | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
SUPPLY | ||||||
VIN | Input voltage range | 2 | 6 | V | ||
IOUT | Output current | 2.3 V ≤ VIN ≤ 6 V | 300 | mA | ||
2 V ≤ VIN ≤ 2.3 V | 150 | |||||
IQ | Operating quiescent current | IOUT = 0 mA. PFM mode enabled (MODE = GND) device not switching | 15 | μA | ||
IOUT = 0 mA. PFM mode enabled (MODE = GND) device switching, VOUT = 1.8 V, (1) | 18.5 | |||||
IOUT = 0 mA, switching with no load (MODE = VIN), PWM operation , VOUT = 1.8 V, VIN = 3 V | 3.8 | mA | ||||
ISD | Shutdown current | EN = GND | 0.1 | 1 | μA | |
UVLO | Undervoltage lockout threshold | Falling | 1.85 | V | ||
Rising | 1.95 | |||||
ENABLE, MODE | ||||||
VIH | High level input voltage, EN, MODE | 2 V ≤ VIN ≤ 6 V | 1 | VIN | V | |
VIL | Low level input voltage, EN, MODE | 2 V ≤ VIN ≤ 6 V | 0 | 0.4 | V | |
IIN | Input bias current, EN, MODE | EN, MODE = GND or VIN | 0.01 | 1 | μA | |
POWER SWITCH | ||||||
RDS(on) | High-side MOSFET ON-resistance | VIN = VGS = 3.6 V, TA = 25°C | 240 | 480 | mΩ | |
Low-side MOSFET ON-resistance | 180 | 380 | ||||
ILIMF | Forward current-limit MOSFET high-side and low-side | VIN = VGS = 3.6 V | 0.56 | 0.7 | 0.84 | A |
TSD | Thermal shutdown | Increasing junction temperature | 140 | °C | ||
Thermal shutdown hysteresis | Decreasing junction temperature | 20 | °C | |||
OSCILLATOR | ||||||
fSW | Oscillator frequency | 2 V ≤ VIN ≤ 6 V | 2 | 2.25 | 2.5 | MHz |
OUTPUT | ||||||
VOUT | Adjustable output voltage range | 0.6 | VIN | V | ||
VREF | Reference voltage | 600 | mV | |||
VFB | Feedback voltage | MODE = VIN, PWM operation, 2 V ≤ VIN ≤ 6 V, in fixed output voltage versions VFB = VOUT, see (3)
|
–1.5% | 0% | 1.5% | |
Feedback voltage PFM mode | MODE = GND, device in PFM mode | 0% | ||||
Load regulation | PWM mode | -0.5 | %/A | |||
tStart Up | Start-up Time | Time from active EN to reach 95% of VOUT nominal | 500 | μs | ||
tRamp | VOUT ramp-up time | Time to ramp from 5% to 95% of VOUT | 250 | μs | ||
Ilkg | Leakage current into SW pin | VIN = 3.6 V, VIN = VOUT = VSW, EN = GND,(2) | 0.1 | 1 | μA |