The TPS61071-Q1 device provides a power supply solution for products powered by lower-voltage DC rails or a one-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-ion or Li-polymer battery. Output currents can go as high as 75 mA, while using a single-cell alkaline, and discharge down to 0.9 V. The device can also generate 5 V at 200 mA from a 3.3-V rail or a Li-ion battery. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. The maximum peak current in the boost switch is limited typically to a value of 600 mA.
The TPS61071-Q1 output voltage is programmed by an external resistor divider. To minimize battery drain, disable the converter. During shutdown, the load disconnects from the battery. The device package is a 6-pin thin SOT package (DDC).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS61071-Q1 | SOT (6) | 1.60 mm × 2.90 mm |
Changes from * Revision (May 2010) to A Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | SW | I | Boost and rectifying switch input |
2 | GND | — | Device (IC) ground connection for logic and power |
3 | EN | I | Enable input (1/VBAT enabled, 0/GND disabled) |
4 | FB | I | Voltage feedback for programming the output voltage |
5 | VOUT | O | Boost converter output |
6 | VBAT | I | Supply voltage |
MIN | MAX | UNIT | |
---|---|---|---|
Input voltage range on SW, VOUT, VBAT, EN, FB | –0.3 | 7 | V |
Operating virtual junction temperature, TJ | –40 | 150 | °C |
Storage temperature, Tstg | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per AEC Q100-002(1) | ±2000 | V |
Charged-device model (CDM), per AEC Q100-011 | ±1000 |
MIN | NOM | MAX | UNIT | |
---|---|---|---|---|
Supply voltage at VBAT, VI | 0.9 | 5.5 | V | |
Operating free air temperature range, TA | –40 | 105 | °C | |
Operating virtual junction temperature range, TJ | –40 | 125 | °C |
THERMAL METRIC(1) | TPS61071-Q1 | UNIT | |
---|---|---|---|
DDC (SOT) | |||
6 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 139.1 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 34.8 | °C/W |
RθJB | Junction-to-board thermal resistance | 42.5 | °C/W |
ψJT | Junction-to-top characterization parameter | 1.4 | °C/W |
ψJB | Junction-to-board characterization parameter | 40.7 | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | ||
---|---|---|---|---|---|---|---|
DC-DC STAGE | |||||||
VI | Minimum input voltage range for start-up | RL = 270 Ω | 1.1 | 1.25 | V | ||
Input voltage range, after start-up | TA = 25°C | 0.9 | 5.5 | ||||
VO | Output voltage range | 1.8 | 5.5 | V | |||
V(FB) | Feedback voltage | TA = 25°C | 490 | 500 | 510 | mV | |
f | Oscillator frequency | 960 | 1200 | 1440 | kHz | ||
I(SW) | Switch current limit | VOUT= 3.3 V | 455 | 600 | 735 | mA | |
Start-up current limit | 0.5 × ISW | mA | |||||
Boost switch-on resistance | VOUT= 3.3 V | 480 | mΩ | ||||
Rectifying switch-on resistance | VOUT= 3.3 V | 600 | mΩ | ||||
Total accuracy (including line and load regulation) | 5% | ||||||
Line regulation | 1% | ||||||
Load regulation | 1% | ||||||
Quiescent current | VBAT | IO= 0 mA, V(EN)= VBAT = 1.2 V, VOUT = 3.3 V, TA = 25°C |
0.5 | 1 | µA | ||
VOUT | 190(1) | 300(1) | |||||
20(2) | |||||||
Shutdown current | V(EN) = 0 V, VBAT = 1.2 V, TA = 25°C | 0.05 | 0.5 | µA | |||
CONTROL STAGE | |||||||
V(UVLO) | Undervoltage lockout threshold | V(BAT) voltage decreasing | 0.8 | V | |||
VIL | EN input low voltage | 0.2 × VBAT | V | ||||
VIH | EN input high voltage | 0.8 × VBAT | V | ||||
EN input current | Clamped on GND or VBAT | 0.01 | 0.1 | µA | |||
Overtemperature protection | 140 | °C | |||||
Overtemperature hysteresis | 20 | °C |
FIGURE | ||
---|---|---|
Maximum output current | vs Input voltage | Figure 1 |
Efficiency | vs Output current | Figure 2 |
vs Output current | Figure 3 | |
vs Output current | Figure 4 | |
vs Input voltage | Figure 5 | |
vs Input voltage | Figure 6 | |
Output voltage | vs Output current | Figure 7 |
vs Output current | Figure 8 | |
No load supply current into VOUT | vs Input voltage | Figure 9 |
Waveforms | Output voltage in continuous mode | Figure 10 |
Output voltage in continuous mode | Figure 11 | |
Load transient response | Figure 12 | |
Load transient response | Figure 13 | |
Line transient response | Figure 14 | |
Line transient response | Figure 15 | |
Start-up after enable | Figure 16 | |
Start-up after enable | Figure 17 |