TPS62142
Synchronous Buck ConverterThe TPS62142 is a synchronous buck converter from Texas Instruments. View the full TPS62142 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
TPS62142 shares its datasheet with TPS62140, whose page lists every part number it covers.
Official TPS62142 datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsCategory
Switching Regulators (Buck)TPS62142 Key Specifications
| Parameter | Value |
|---|---|
| Quiescent current (EN = High, IOUT = 0 mA, not switching) | 17 μA typ, 30 μA max (25 μA max for TA = -40 to 85 °C) |
| Shutdown current (EN = Low) | 1.5 μA typ, 25 μA max (4 μA max for TA = -40 to 85 °C) |
| High-side MOSFET rDS(on) | 90 mΩ typ, 170 mΩ max (VIN ≥ 6 V) |
| Low-side MOSFET rDS(on) | 40 mΩ typ, 70 mΩ max (VIN ≥ 6 V) |
| High-side forward current limit | 2.45 A min, 3 A typ, 3.5 A max (VIN = 12 V, TA = 25 °C) |
| UVLO falling threshold | 2.7 V typ (2.6–2.8 V), 200 mV hysteresis |
| Feedback voltage (PWM mode, VIN ≥ VOUT + 1 V) | 800 mV typ (785.6–814.4 mV) |
| Thermal shutdown | 160 °C typ, 20 °C hysteresis |
| SS/TR source current | 2.5 μA typ (2.3–2.7 μA) |
| Thermal resistance RθJA | 45 °C/W |
TPS62142 Overview
Part: TPS62140A (TPS6214x family: TPS62140, TPS62140A, TPS62141, TPS62142, TPS62143) — Texas Instruments
Type: Synchronous Step-Down (Buck) Converter
Description: 3–17 V input, 2 A synchronous step-down converter with DCS-Control topology, 2.5 MHz typical switching frequency and 17 μA typical quiescent current in a 3 mm × 3 mm VQFN-16 package.
Operating Conditions:
- Supply voltage: 3–17 V (AVIN and PVIN)
- Operating junction temperature: -40 to 125 °C
- Output voltage range: 0.9–6 V (adjustable versions, VIN ≥ VOUT)
- Switching frequency: about 2.5 MHz (FSW low) or about 1.25 MHz (FSW high)
Absolute Maximum Ratings:
- Max supply voltage (AVIN, PVIN): 20 V
- Max PG sink current: 10 mA
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
Key Specs:
- Quiescent current (EN = High, IOUT = 0 mA, not switching): 17 μA typ, 30 μA max (25 μA max for TA = -40 to 85 °C)
- Shutdown current (EN = Low): 1.5 μA typ, 25 μA max (4 μA max for TA = -40 to 85 °C)
- High-side MOSFET rDS(on): 90 mΩ typ, 170 mΩ max (VIN ≥ 6 V)
- Low-side MOSFET rDS(on): 40 mΩ typ, 70 mΩ max (VIN ≥ 6 V)
- High-side forward current limit: 2.45 A min, 3 A typ, 3.5 A max (VIN = 12 V, TA = 25 °C)
- UVLO falling threshold: 2.7 V typ (2.6–2.8 V), 200 mV hysteresis
- Feedback voltage (PWM mode, VIN ≥ VOUT + 1 V): 800 mV typ (785.6–814.4 mV)
- Thermal shutdown: 160 °C typ, 20 °C hysteresis
- SS/TR source current: 2.5 μA typ (2.3–2.7 μA)
- Thermal resistance RθJA: 45 °C/W
Features:
- DCS-Control topology
- Up to 2 A output current
- Pin-selectable output voltage (nominal or +5%)
- Programmable soft start and tracking
- Seamless power-save mode transition
- Selectable operating frequency
- Power-good output
- 100% duty-cycle mode
- Short-circuit and overtemperature protection
- Pin-to-pin compatible with the TPS62130 and TPS62150
- Fixed output versions: TPS62141 (1.8 V), TPS62142 (3.3 V), TPS62143 (5.0 V)
Applications:
- Standard 12-V rail supplies
- POL supply from single or multiple Li-ion batteries
- Solid-state drives
- Embedded systems
- LDO replacement
- Mobile PCs, tablets, modems, cameras
- Server, microserver
- Data terminal, point of sales (ePOS)
Package:
- VQFN-16 (RGT), 3.00 mm × 3.00 mm
TPS62142 Features
- DCS-Control ™ topology
- Input voltage range: 3 V to 17 V
- Up to 2-A output current
- Adjustable output voltage from 0.9 V to 6 V
- Pin-selectable output voltage (nominal, +5%)
- Programmable soft start and tracking
- Seamless power-save mode transition
- Quiescent current of 17 μA (typical)
- Selectable operating frequency
- Power-good output
- 100% duty-cycle mode
- Short-circuit protection
- Overtemperature protection
- Pin-to-pin compatible with the TPS62130 and TPS62150
- Available in a 3-mm × 3-mm, VQFN-16 package
- Use the TPS82140 for faster designs
TPS62142 Applications
- Standard 12-V rail supplies
- POL supply from single or multiple Li-ion battery
- Solid-state drives
- Embedded systems
- LDO replacement
- Mobile PCs, tablets, modems, cameras
- Server, microserver
- Data terminal, point of sales (ePOS)
TPS62142 Pin Configuration
Figure 6-1. 16-Pin VQFN RGT Package (Top View)
Table 6-1. Pin Functions
| PIN (1) - NO. | PIN (1) - NAME | I/O | DESCRIPTION |
|---|---|---|---|
| 1,2,3 | SW | O | Switch node, which is connected to the internal MOSFET switches. Connect inductor between SW and the output capacitor. |
| 4 | PG | O | Output power good (high = V OUT ready, low = V OUT below nominal regulation); open drain (requires pullup resistor) |
| 5 | FB | I | Voltage feedback of the adjustable version. Connect a resistive voltage divider to this pin. It is recommended to connect FB to AGND on fixed output voltage versions for improved thermal performance. |
| 6 | AGND | Analog ground. Must be connected directly to the exposed thermal pad and common ground plane. | |
| 7 | FSW | I | Switching frequency select (low ≈ 2.5 MHz, high ≈ 1.25 MHz (2) for typical operation) (3) |
| 8 | DEF | I | Output voltage scaling (low = nominal, high = nominal + 5%) (3) |
| 9 | SS/TR | I | Soft-start/tracking [in. An external capacitor connected to this pin sets the internal voltage reference rise time. It can be used for tracking and sequencing. |
| 10 | AVIN | I | Supply voltage for control circuitry. Connect to the same source as PVIN. |
| 11,12 | PVIN | I | Supply voltage for power stage. Connect to the same source as AVIN. |
| 13 | EN | I | Enable input (high = enabled, low = disabled) (3) |
| 14 | VOS | I | Output voltage sense pin and connection for the control loop circuitry |
| 15,16 | PGND | Power ground. Must be connected directly to the exposed thermal pad and common ground plane. | |
| Exposed Thermal Pad | Must be connected to AGND (pin 6), PGND (pin 15, 16), and common ground plane. See Figure 11-1. Must be soldered to achieve appropriate power dissipation and mechanical reliability. |
- (1) For more information about connecting pins, see Section 8 and Section 9.
- (2) Connect FSW to VOUT or PG in this case.
- (3) An internal pulldown resistor keeps the logic level low, if pin is floating.
TPS62142 Electrical Characteristics
over operating junction temperature (TJ = -40°C to 125°C), typical values at VIN=12V and TA=25°C (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|---|
| SUPPLY | SUPPLY | SUPPLY | SUPPLY | SUPPLY | SUPPLY | SUPPLY | SUPPLY |
| V | Input voltage range (1) | IN | IN | 3 | 17 | V | |
| I Q | Operating quiescent current | EN = High, I OUT = 0 mA, device not switching | 17 | 30 | μA | ||
| I Q | Operating quiescent current | EN = High, I OUT = 0 mA, device not switching | T A = -40°C to +85°C | 17 | 25 | ||
| I SD | Shutdown current (2) | EN = Low | 1.5 | 25 | μA | ||
| I SD | Shutdown current (2) | EN = Low | T A = -40°C to +85°C | 1.5 | 4 | ||
| V UVLO | Undervoltage lockout threshold | Falling input voltage (PWM mode operation) | Falling input voltage (PWM mode operation) | 2.6 | 2.7 | 2.8 | V |
| V UVLO | Undervoltage lockout threshold | Hysteresis | Hysteresis | 200 | mV | ||
| T SD | Thermal shutdown temperature | 160 | °C | ||||
| T SD | Thermal shutdown hysteresis | 20 | |||||
| CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) | CONTROL (EN, DEF, FSW, SS/TR, PG) |
| V | High level input threshold voltage (EN, DEF, FSW) | H | H | 0.9 | 0.65 | V | |
| L | Low level input threshold voltage (EN, DEF, FSW) | V | V | 0.45 | 0.3 | V | |
| I LKG | Input leakage current (EN, DEF, FSW) | EN = V IN or GND; DEF, FSW = V OUT or GND | EN = V IN or GND; DEF, FSW = V OUT or GND | 0.01 | 1 | μA | |
| V TH_PG | Power-good threshold voltage | Rising (%V OUT ) | Rising (%V OUT ) | 92% | 95% | 98% | |
| V OL_PG | Power-good output low voltage | Falling (%V ) | Falling (%V ) | 87% | 90% | 94% 0.3 | V |
| I LKG_PG | Input leakage current (PG) | PG V = 1.8 V | PG V = 1.8 V | 0.07 1 | 400 | nA | |
| I | 2.7 | μA | |||||
| SS/TR | SS/TR pin source current | 2.3 | 2.5 | ||||
| POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH | POWER SWITCH |
| r DS(on) | High-side MOSFET ON-resistance | V IN ≥ 6 V | V IN ≥ 6 V | 90 | 170 | mΩ | |
| r DS(on) | High-side MOSFET ON-resistance | V IN = 3 V | V IN = 3 V | 120 | |||
| r DS(on) | Low-side MOSFET ON-resistance | V IN ≥ 6 V | V IN ≥ 6 V | 40 | 70 | mΩ | |
| r DS(on) | Low-side MOSFET ON-resistance | V IN = 3 V | V IN = 3 V | 50 | |||
| I LIMF | High-side MOSFET forward current limit (3) | V IN = 12 V, T A = 25°C | V IN = 12 V, T A = 25°C | 2.45 | 3 | 3.5 | A |
| OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT | OUTPUT |
| I LKG_FB | Input leakage current (FB) | TPS62140, V FB = 0.8 V | TPS62140, V FB = 0.8 V | 1 | 100 | nA | |
| V OUT | Output voltage range (TPS62140) | V IN ≥ V OUT | V IN ≥ V OUT | 0.9 | 6.0 | V | |
| V OUT | DEF (output voltage programming) | DEF = 0 (GND) | DEF = 0 (GND) | V | OUT | ||
| V OUT | DEF (output voltage programming) | DEF = 1 (V OUT ) | DEF = 1 (V OUT ) | V OUT + 5% | V OUT + 5% | ||
| V OUT | PWM mode operation, V IN ≥ V OUT + 1 V | PWM mode operation, V IN ≥ V OUT + 1 V | 785.6 | 800 | 814.4 | ||
| V OUT | Initial output voltage accuracy (4) | PWM mode operation, V IN ≥ V OUT +1 V, T A = -10°C to 85°C | PWM mode operation, V IN ≥ V OUT +1 V, T A = -10°C to 85°C | 788.0 | 800 | 812.8 | mV |
| V OUT | Power-save mode operation, C OUT = 22 μF | Power-save mode operation, C OUT = 22 μF | 781.6 | 800 | 822.4 | ||
| V OUT | Load regulation (5) | V IN = 12 V, V OUT = 3.3 V, PWM mode operation | V IN = 12 V, V OUT = 3.3 V, PWM mode operation | 0.05 | %/A | ||
| V OUT | Line regulation (5) | 3 V ≤ V IN ≤ 17 V, V OUT = 3.3 V, I OUT = 1 A, PWM mode operation | 3 V ≤ V IN ≤ 17 V, V OUT = 3.3 V, I OUT = 1 A, PWM mode operation | 0.02 | %/V |
TPS62142 Absolute Maximum Ratings
over operating junction temperature range (unless otherwise noted)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Pin voltage (2) | AVIN, PVIN | -0.3 | 20 | V |
| Pin voltage (2) | EN, SS/TR | -0.3 | V IN +0.3 | V |
| Pin voltage (2) | SW | -0.3 | V IN +0.3 | V |
| Pin voltage (2) | DEF, FSW, FB, PG, VOS | -0.3 | 7 | V |
| Power-good sink current | PG | 10 | mA | |
| Temperature | Operating junction temperature, T J | -40 | 150 | °C |
| Temperature | Storage temperature, T stg | -65 | 150 | °C |
TPS62142 Recommended Operating Conditions
over operating junction temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |
|---|---|---|---|---|
| Supply voltage, V IN (at AVIN and PVIN) | 3 | 17 | V | |
| Operating junction temperature, T J | -40 | 125 | °C |
TPS62142 Thermal Information
| THERMAL METRIC | (1) | TPS6214x RGT (VQFN) 16 PINS | UNIT |
|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 45 | °C/W |
| R θJC(top) | Junction-to-case(top) thermal resistance | 53.6 | °C/W |
| R θJB | Junction-to-board thermal resistance | 17.4 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 1.1 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 17.4 | °C/W |
| R θJC(bot) | Junction-to-case(bottom) thermal resistance | 4.5 | °C/W |
TPS62142 Typical Application
The TPS62140 is a switched mode step-down converter, able to convert a 3-V to 17-V input voltage into a 0.9-V to 6-V output voltage, providing up to 2 A. It needs a minimum amount of external components. Apart from the LC output filter and the input capacitor, only the TPS62140 (TPS62140A) with an adjustable output voltage needs an additional resistive divider to set the output voltage level.
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- LM2596 – onsemi, Step-Down Voltage Regulator
- TPS562200 – Texas Instruments, Synchronous Buck Converter
- AP63203WU – Diodes Incorporated, Synchronous Buck Converter
- TPS54202 – Texas Instruments, Synchronous Buck Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Texas Instruments datasheets (2,442)
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