TPS62140
Synchronous Buck ConverterThe TPS62140 is a synchronous buck converter from Texas Instruments. View the full TPS62140 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Switching Regulators (Buck)Overview
Part: TPS62140, TPS62140A, TPS62141, TPS62142, TPS62143 — Texas Instruments
Type: Synchronous Step-Down DC-DC Converter
Description: A 3 V to 17 V input, up to 2 A synchronous step-down DC-DC converter optimized for high power density applications, featuring DCS-Control topology and adjustable output voltage from 0.9 V to 6 V.
Operating Conditions:
- Supply voltage: 3 V to 17 V
- Operating junction temperature: -40 to 125 °C
- Output voltage range: 0.9 V to 6 V (adjustable version)
- Switching frequency: Typically 2.5 MHz or 1.25 MHz (selectable)
Absolute Maximum Ratings:
- Max supply voltage (AVIN, PVIN): 20 V
- Max junction temperature: 150 °C
- Max storage temperature: 150 °C
Key Specs:
- Input voltage range: 3 V to 17 V
- Operating quiescent current (EN = High, I OUT = 0 mA, device not switching): 17 μA (typ)
- Shutdown current (EN = Low): 1.5 μA (typ)
- High-side MOSFET ON-resistance (V IN ≥ 6 V): 90 mΩ (typ)
- Low-side MOSFET ON-resistance (V IN ≥ 6 V): 40 mΩ (typ)
- High-side MOSFET forward current limit (V IN = 12 V, T A = 25°C): 3 A (typ), 3.5 A (max)
- Output voltage range (TPS62140): 0.9 V to 6.0 V
- Power-good threshold voltage (Rising): 95% V OUT (typ)
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
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)
Package:
- VQFN-16 (3 mm × 3 mm)
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
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)
Pin Configuration
Figure 6-1. 16-Pin VQFN RGT Package (Top View)
Table 6-1. Pin Functions
| PIN (1) | PIN (1) | I/O | DESCRIPTION |
|---|---|---|---|
| NO. | 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.
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 |
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 |
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 |
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 |
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.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS62140A | Texas Instruments | — |
| TPS62140ARGTR | Texas Instruments | VFQFN-16-EP(3x3) |
| TPS62140ARGTR.B | Texas Instruments | — |
| TPS62140ARGTT | Texas Instruments | — |
| TPS62140ARGTT.B | Texas Instruments | — |
| TPS62140RGT | Texas Instruments | — |
| TPS62140RGTR | Texas Instruments | — |
| TPS62140RGTR.B | Texas Instruments | — |
| TPS62140RGTT | Texas Instruments | — |
| TPS62140RGTT.B | Texas Instruments | — |
| TPS62141 | Texas Instruments | — |
| TPS62142 | Texas Instruments | — |
| TPS62143 | Texas Instruments | — |
| TPS6214X | Texas Instruments | — |
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