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TPS63901 器件是一款具有超低静态电流(典型值为 75nA)的高效同步降压/升压转换器。该器件具有 32 个用户可编程的输出电压设置,范围为 1.8V 至 5V。
动态电压调节特性使各项应用可于运行期间在两个输出电压之间进行切换;例如,在待机运行期间,可通过降低系统电源电压来降低功耗。
凭借其宽电源电压范围和可编程的输入电流限制(1mA 至 100mA 和无限制),该器件非常适合与 3 芯串联碱性电池、1 芯锂二氧化锰 (Li-MnO2) 或 1 芯锂亚硫酰氯 (Li-SOCl2) 等各种一次电池以及二次电池搭配使用。
高输出电流功能支持 sub-1GHz、BLE、LoRa、wM-Bus 和 NB-IoT 等常用射频标准。
器件型号(1) | 封装 | 封装尺寸(标称值) |
---|---|---|
TPS63901 | WCSP (12) | 1.50 mm × 1.15 mm |
Pin | Type | Description | |
---|---|---|---|
Name | No. | ||
LX1 |
A1 |
— |
Switching node of the buck stage |
VIN |
A2 |
— | Supply voltage |
EN |
A3 |
I | Device enable. A high level applied to this pin enables the device and a low level disables it. It must not be left open. |
GND |
B1,C1 |
— | Ground |
CFG1 |
B2 |
I | Configuration pin 1. Connect a resistor between this pin and ground to set VO(2) and input current limit. Must not be left open. |
SEL |
B3 |
I | Output voltage select. Selects VO(2) when a high level is applied to this pin. Selects VO(1) when a low level is applied to this pin. It must not be left open. |
VOUT |
C2,D2 |
— | Output voltage. The C2 and D2 pins must be connected together. |
CFG2 |
C3 |
I | Configuration pin 2. Connect a resistor between this pin and ground to set VO(2) and input current limit. Must not be left open. |
LX2 |
D1 |
— | Switching node of the boost stage |
CFG3 | D3 | I | Configuration pin 3. Connect a resistor between this pin and ground to set VO(1). Must not be left open. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
VI | Input voltage (VIN, LX1, LX2, VOUT, EN, CFG1, CFG2, CFG3, SEL)(2) | –0.3 | 5.9 | V |
TJ | Operating junction temperature | –40 | 150 | °C |
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged device model (CDM), per ANSI/ESDA/JEDEC JS-002(2) | ±750 |
MIN | NOM | MAX | UNIT | |||
---|---|---|---|---|---|---|
VI | Supply voltage | 1.8 | 5.5 | V | ||
VO | Output voltage | 1.8 | 5.0 | V | ||
CI | Input capacitance (VI = 2.5 V to 5 V, VO = 3.3 V, IO = 0.4 A)(1) | 5 | µF | |||
CO | Output capacitance (VI = 2.5 V to 5 V, VO = 3.3 V, IO = 0.4 A)(1) | 10 | µF | |||
C(CFG) | Capacitance (CFG1, CFG2, CFG3) | 10 | pF | |||
L | Inductance | 2.2 | µH | |||
ISAT | Inductor saturation current rating | Unlimited current setting | 2 | A | ||
≤ 100-mA current settings | 1 | |||||
TA | Operating ambient temperature | –40 | 85 | °C | ||
TJ | Operating junction temperature | –40 | 125 | °C |
THERMAL METRIC(1) | YCJ (WCSP) | UNIT | |
---|---|---|---|
12 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 102.4 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 0.6 | °C/W |
RθJB | Junction-to-board thermal resistance | 26.1 | °C/W |
ψJT | Junction-to-top characterization parameter | 0.3 | °C/W |
ψJB | Junction-to-board characterization parameter | 26.1 | °C/W |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |||
---|---|---|---|---|---|---|---|---|
SUPPLY | ||||||||
IQ | Quiescent current into VIN | V(EN) =
3 V, no load, not switching, "unlimited" current setting; TJ = –40°C to 85°C |
0.075 | 1 | µA | |||
ISD | Shutdown current into VIN | V(EN) = 0 V ; TJ = –40°C to 85°C | 60 | nA | ||||
VIT+(UVLO) | Positive-going UVLO threshold voltage | 1.73 | 1.75 | 1.77 | V | |||
Vhys(UVLO) | UVLO threshold voltage hysteresis | 90 | 100 | 110 | mV | |||
VIT+(POR) | Positive-going POR threshold voltage | 1.37 | 1.74 | V | ||||
I/O SIGNALS | ||||||||
VIH | High-level input voltage (EN, SEL) | 1.2 | V | |||||
VIL | Low-level input voltage (EN, SEL) | 0.4 | V | |||||
Input current (EN, SEL) | V(EN), V(SEL) = 1.8 V or 0 V | ±1 | ±10 | nA | ||||
POWER SWITCH | ||||||||
rDS(on) | On-state resistance | Q1 | VI = 3 V, VO = 5 V, test current = 1 A | 140 | mΩ | |||
Q2 | VI = 3 V, VO = 3 V, test current = 1 A | 95 | ||||||
Q3 | VI = 3 V, VO = 3 V, test current = 1 A | 95 | ||||||
Q4 | VI = 5 V, VO = 3 V, test current = 1 A | 140 | ||||||
CURRENT LIMIT | ||||||||
Peak current limit during start-up (Q1) | VI = 3.6 V, unlimited current limit setting |
0.35 |
0.83 | A | ||||
Peak current limit (Q1) | VI = 1.8 V, VO = 3.6 V, unlimited current limit setting |
1.33 | 1.45 | 1.6 |
A | |||
VI = 3.6 V, VO = 3.3 V, 100-mA current limit setting |
0.15 | 0.29 |
0.51 | |||||
Average input current limit | TJ = –40°C to 85°C | 1-mA setting | 1 | mA | ||||
2.5-mA setting | 2.5 | |||||||
5-mA setting | 5 | |||||||
10-mA settting | 10 | |||||||
25-mA setting | 25 | |||||||
50-mA setting | 50 | |||||||
100-mA setting | 100 | |||||||
OUTPUT | ||||||||
Output voltage DC accuracy | IO = 1 mA, CO(eff) = 10 µF, L(eff) = 2.2 µH | ±1.5% | ||||||
CONTROL | ||||||||
Internal reference resistor | 33 | kΩ | ||||||
RCFG | R2D setting #0 | 0 | 0.1 | kΩ | ||||
R2D setting #1 | –3% | 0.511 | +3% | |||||
R2D setting #2 | –3% | 1.15 | +3% | |||||
R2D setting #3 | –3% | 1.87 | +3% | |||||
R2D setting #4 | –3% | 2.74 | +3% | |||||
R2D setting #5 | –3% | 3.83 | +3% | |||||
R2D setting #6 | –3% | 5.11 | +3% | |||||
R2D setting #7 | –3% | 6.49 | +3% | |||||
R2D setting #8 | –3% | 8.25 | +3% | |||||
R2D setting #9 | –3% | 10.5 | +3% | |||||
R2D setting #10 | –3% | 13.3 | +3% | |||||
R2D setting #11 | –3% | 16.2 | +3% | |||||
R2D setting #12 | –3% | 20.5 | +3% | |||||
R2D setting #13 | –3% | 24.9 | +3% | |||||
R2D setting #14 | –3% | 30.1 | +3% | |||||
R2D setting #15 | –3% | 36.5 | +3% | |||||
PROTECTION FEATURES | ||||||||
Thermal shutdown threshold temperature | 140 | 150 | 160 | °C | ||||
Thermal shutdown hysteresis | 15 | 20 | 25 | °C | ||||
TIMING PARAMETERS | ||||||||
td(POR) | POR signal delay after reaching POR threshold | 3.8 | ms | |||||
td(EN) | Delay between a rising edge on the EN pin and the start of the output voltage ramp | Supply voltage stable before EN pin goes high | 1.5 | ms | ||||
tw(SS) | Soft-start step duration | VO > 1.8 V | 100 | 125 | 150 | µs | ||
td(SEL) | Delay between a change in the state of the SEL pin and the first step change in the output voltage | 30 | 40 | µs | ||||
tw(DVS) | Dynamic voltage scaling step duration | 100 | 125 | 150 | µs | |||
td(RESTART) | Restart delay after protection | 10 | 11 | ms |
VO = 5.1 V | EN = HIGH | IO = 0 mA, device not switching |
VO = 5.1 V | EN = LOW |
VO = 5.1 V | EN = HIGH | IO = 0 mA, device not switching |
The TPS63901 device is a four-switch synchronous buck-boost converter with a maximum output current of 400 mA. The device has a single-mode operation that allows the device to regulate the output voltage to a level above, below, or equal to the input voltage without displaying the mode-switching transients and unpredictable inductor current ripple from which many other buck-boost devices suffer.
The switching frequency of the TPS63901 device varies with the operating conditions: it is lowest when IO is low and increases smoothly as IO increases.