TPS61021ADSGT
Synchronous Boost ConverterThe TPS61021ADSGT is a synchronous boost converter from Texas Instruments. View the full TPS61021ADSGT datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Synchronous Boost Converter
Overview
Part: TPS61021A — Texas Instruments
Type: Synchronous Boost Converter
Description: A 0.5–4.4 V input, 3 A synchronous boost converter with 2 MHz switching frequency, up to 91% efficiency, and 17 μA quiescent current, designed for portable and smart devices.
Operating Conditions:
- Supply voltage: 0.5–4.4 V
- Operating temperature: -40 to 125 °C
- Output voltage setting range: 1.8–4.0 V
- Effective inductance range: 0.2–1.3 μH
Absolute Maximum Ratings:
- Max supply voltage (VIN, SW, VOUT): 4.6 V (DC), 4.8 V (10% duty cycle)
- Max junction temperature: 150 °C
- Max storage temperature: 150 °C
Key Specs:
- Efficiency: Up to 91% (VIN = 2.4V, VOUT = 3.3V, IOUT = 1.5A)
- Switching frequency: 2.0 MHz (VIN > 1.5V, PWM mode)
- Quiescent current (VOUT pin): 17 μA (typ, no load, no switching, TJ up to 85°C)
- Reference voltage at FB pin (PWM mode): 775 mV (min), 795 mV (typ), 815 mV (max)
- Output over-voltage protection threshold: 4.15 V (min), 4.35 V (typ), 4.60 V (max)
- High-side MOSFET on resistance: 51 mΩ (typ, VOUT = 3.3V)
- Low-side MOSFET on resistance: 58 mΩ (typ, VOUT = 3.3V)
- Valley current limit: 3.0 A (min), 4.3 A (typ) (VIN = 2.4V, VOUT = 3.3V)
Features:
- Minimum input voltage at startup: 0.9V
- Light load Pulse Frequency Modulation (PFM) operation
- True input-to-output disconnection in shutdown
- Output over-voltage protection
- Output short-circuit protection
- Thermal shutdown protection
Applications:
- Battery-powered IoT devices
- Gaming controls
- Thermostats
- Portable medical equipment
- Supercapacitor backup systems
Package:
- WSON (8) 2.00mm x 2.00mm
Pin Configuration
DSG Package 8-Pin WSON with Thermal Pad Top View
Electrical Characteristics
TJ = -40°C to 125°C, VIN = 2.4 V and VOUT = 3.3 V. Typical values are at T J = 25°C (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY | POWER SUPPLY |
| V IN | Input voltage range | 0.5 | 4.4 | V | ||
| V IN rising | 0.8 | 0.9 | V | |||
| V IN_UVLO | Under-voltage lockout threshold | V IN falling | 0.28 | 0.4 | 0.5 | V |
| I | Quiescent current into VIN pin | IC enabled, No load, No switching V IN = 1.8 V to 3.6 V, V FB = V REF + 0.1 V, T J up to 85°C | 3.0 | μA | ||
| Q | Quiescent current into VOUT pin | IC enabled, No load, No switching V OUT = 1.8 V to 4.0 V, V FB = V REF + 0.1 V, T J up to 85°C | 17 | 30 | μA | |
| I SD | Shutdown current into VIN and SW pin | IC disabled, V IN = 1.8 V to 3.6 V, T J up to 85°C | 0.5 | 3.0 | μA | |
| OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT |
| V OUT | Output voltage setting range | 1.8 | 4.0 | V | ||
| PWM mode | 775 | 795 | 815 | mV | ||
| V REF | Reference voltage at the FB pin | PFM mode | 801 | mV | ||
| V OVP | Output over-voltage protection threshold | V OUT rising | 4.15 | 4.35 | 4.60 | V |
| V OVP_HYS | Over-voltage protection hysteresis | 0.1 | V | |||
| I FB_LKG | Leakage current at FB pin | 20 | nA | |||
| I SW_LKG | Leakage current into SW pin | IC disabled, T J up to 85°C | 3.0 | μA | ||
| I VOUT_LKG | Leakage current into VOUT pin | IC disabled, V OUT = 4.0 V, T J up to 85°C | 1 | 2 | μA | |
| POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH |
| R DS(on) | High-side MOSFET on resistance | V OUT = 3.3 V | 51 | m Ω | ||
| Low-side MOSFET on resistance | V OUT = 3.3 V | 58 | m Ω | |||
| f SW | Switching frequency | V IN = 2.4 V, V OUT = 3.3 V, PWM mode | 2.0 | MHZ | ||
| t OFF_min | Minimum off time | 80 | 120 | ns | ||
| I LIM_SW | Valley current limit | V IN = 2.4 V, V OUT = 3.3 V | 3.0 | 4.3 | A | |
| LOGIC INTERFACE | LOGIC INTERFACE | LOGIC INTERFACE | LOGIC INTERFACE | LOGIC INTERFACE | LOGIC INTERFACE | LOGIC INTERFACE |
| V EN_H | EN Logic high threshold | V IN > 1.2 V V IN ≤ 1.2 V | 0.84 0.7 x V IN | V V | ||
| V EN_L | EN Logic Low threshold | V IN > 1.2 V V IN ≤ 1.2 V | 0.36 0.3 x VIN | V | ||
| PROTECTION | PROTECTION | PROTECTION | PROTECTION | PROTECTION | PROTECTION | PROTECTION |
| T SD | Thermal shutdown threshold | T J rising | 150 | °C | ||
| T SD_HYS | Thermal shutdown hysteresis | T J falling below T SD | 20 | °C |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| Voltage range at terminals | EN, FB | DC | -0.3 | 3.6 | V |
| (2) | VIN, SW, VOUT | DC | -0.3 | 4.6 | V |
| 10% duty cycle | -0.3 | 4.8 | V | ||
| Operating junction temperature, T J | -40 | 150 | °C | ||
| Storage temperature, T stg | -65 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |||
|---|---|---|---|---|---|---|
| V IN | Input voltage range | 0.5 | 4.4 | V | ||
| V OUT | Output voltage setting range | 1.8 | 4 | V | ||
| L | Effective inductance range | 0.2 | 0.47 | 1.3 | μH | |
| C IN | Effective input capacitance range | 1 | 4.7 | μF | ||
| C OUT | Effective output capacitance range | I OUT ≤ 0.3 A | 3 | 10 | 200 | μF |
| C OUT | I OUT > 0.3 A | 10 | 20 | 200 | μF | |
| T J | Operating junction temperature | -40 | 125 | °C |
Thermal Information
| THERMAL METRIC | (1) | TPS61021A DSG (WSON) 8 PINS | UNIT |
|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 71.1 | °C/W |
| R θ JC(top) | Junction-to-case (top) thermal resistance | 95.2 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 41.6 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 3.1 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 42 | °C/W |
| R θ JC(bot) | Junction-to-case (bottom) thermal resistance | 13 | °C/W |
Typical Application
The TPS61021A is a synchronous boost converter designed to operate from an input voltage supply range between 0.5 V and 4.4 V with 3-A valley switch current limit. The TPS61021A typically operates at a quasiconstant 2-MHz frequency pulse width modulation (PWM) at moderate to heavy load currents when the input voltage is above 1.5 V. The switching frequency changes to 1-MHz gradually with the input voltage changing from 1.5 V to 1 V to get better efficiency and high step-up ratio. At light load currents, the TPS61021A converter operates in power-save mode with pulse frequency modulation (PFM) to achieve high efficiency over the entire load current range.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS61021A | Texas Instruments | — |
| TPS61021ADSGR | Texas Instruments | WSON-8 (2.00mm x 2.00mm) |
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