TPS54202
Synchronous Buck ConverterThe TPS54202 is a synchronous buck converter from Texas Instruments. View the full TPS54202 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 2A |
| Switching Frequency | 500kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | SOT-23-6 Thin, TSOT-23-6 |
| Packaging | MouseReel |
| Packaging | MouseReel |
| Standard Pack Qty | 3000 |
| Standard Pack Qty | 3000 |
| Supplier Device Package | SOT-23-THIN |
| Supplier Device Package | SOT-23-THIN |
| Supplier Device Package | SOT-23-THIN |
| Supplier Device Package | SOT-23-THIN |
| Supplier Device Package | SOT-23-THIN |
| Synchronous Rectifier | Yes |
| Topology | Buck |
| Input Voltage (Max) | 28V |
| Input Voltage (Min) | 4.5V |
| Output Voltage (Max) | 28V |
| Output Voltage | 0.596V |
Overview
Part: TPS54202 — Texas Instruments
Type: Synchronous Step-Down Converter
Description: A 4.5V to 28V input, 2A synchronous buck converter with integrated MOSFETs, fixed 500kHz switching frequency, and frequency spread spectrum for EMI reduction.
Operating Conditions:
- Supply voltage: 4.5–28 V
- Operating temperature: -40 to 125 °C
- Output voltage range: -0.1 to 28 V
Absolute Maximum Ratings:
- Max supply voltage: 30 V (VIN)
- Max junction temperature: 150 °C
- Max storage temperature: 150 °C
Key Specs:
- Continuous output current: 2 A
- Switching frequency: 500 kHz (typical)
- High-side FET on resistance: 148 mΩ (typical, at TA = 25°C)
- Low-side FET on resistance: 78 mΩ (typical, at TA = 25°C)
- Non-switching quiescent current: 45 μA (typical, EN = 5V, VFB = 1V)
- Shutdown current: 3 μA (typical, EN = GND)
- Feedback voltage: 0.596 V (typical, VIN = 12V)
- Soft-start time: 5 mS (typical)
Features:
- Integrated 148mΩ and 78mΩ MOSFETs
- Low 3μA shutdown, 45μA quiescent current
- Internal 5mS soft start
- Fixed 500kHz switching frequency
- Frequency spread spectrum to reduce EMI
- Advanced Eco-mode™ pulse skip
- Peak current mode control
- Internal loop compensation
- Overcurrent protection for both MOSFETs with hiccup mode protection
- Overvoltage protection
- Thermal shutdown
Applications:
- 12V, 24V distributed power-bus supply
- White goods
- Consumer application
- Audio
- STB, DTV
- Printer
Package:
- DDC (SOT-23, 6)
Features
- 4.5V to 28V wide input voltage range
- Integrated 148mΩ and 78mΩ MOSFETs for 2A, continuous output current
- Low 3μA shutdown, 45μA quiescent current
- Internal 5mS soft start
- Fixed 500kHz switching frequency
- Frequency spread spectrum to reduce EMI
- Advanced Eco-mode ™ pulse skip
- Peak current mode control
- Internal loop compensation
- Overcurrent protection for both MOSFETs with hiccup mode protection
- Overvoltage protection
- Thermal shutdown
- SOT-23 (6) package
Applications
- 12V, 24V distributed power-bus supply
- Industry application
- -White goods
- Consumer application
- -Audio
- -STB, DTV
- -Printer
Copyright © 2016, Texas Instruments Incorporated
Simplified Schematic
Pin Configuration
Figure 4-1. 6-Pin SOT-23 DDC Package (Top View)
Table 4-1. Pin Functions
| PIN | PIN | TYPE (1) |
|---|---|---|
| NAME | NO. | |
| BOOT | 6 | O |
| EN | 5 | I |
| FB | 4 | I |
| GND | 1 | - |
| SW | 2 | O |
| VIN | 3 | - |
(1) O = Output; I = Input
Electrical Characteristics
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = -40°C to +125°C, VIN = 4.5V to 28V, (unless otherwise noted).
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY |
| V IN | Input voltage range | 4.5 | 28 | V | ||
| I Q | Non switching quiescent current | EN =5V, VFB = 1V | 45 | μA | ||
| I OFF | Shut down current | EN = GND | 3 | μA | ||
| V IN(UVLO) | VIN under voltage lockout | Rising V IN | 3.9 | 4.2 | 4.4 | V |
| V IN(UVLO) | Falling V IN | 3.4 | 3.7 | 3.9 | V | |
| V IN(UVLO) | Hysteresis | 400 | 480 | 560 | mV | |
| ENABLE (EN PIN) | ENABLE (EN PIN) | ENABLE (EN PIN) | ENABLE (EN PIN) | ENABLE (EN PIN) | ENABLE (EN PIN) | ENABLE (EN PIN) |
| V (EN_RISING) | Enable threshold | Rising | 1.21 | 1.28 | V | |
| V (EN_FALLING) | Falling | 1.1 | 1.19 | V | ||
| I (EN_INPUT) | Input current | V EN = 1V | 0.7 | μA | ||
| I (EN_HYS) | Hysteresis current | V EN = 1.5V | 1.55 | μA | ||
| FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER | FEEDBACK AND ERROR AMPLIFIER |
| V FB | Feedback Voltage | V IN = 12V | 0.581 | 0.596 | 0.611 | V |
| PULSE SKIP MODE | PULSE SKIP MODE | PULSE SKIP MODE | PULSE SKIP MODE | PULSE SKIP MODE | PULSE SKIP MODE | PULSE SKIP MODE |
| I (SKIP) (1) | Pulse skip mode peak inductor current threshold | V IN = 24V, V OUT = 5V, L = 15 μH | 300 | mA | ||
| POWER STAGE | POWER STAGE | POWER STAGE | POWER STAGE | POWER STAGE | POWER STAGE | POWER STAGE |
| R (HSD) | High-side FET on resistance | T A = 25°C, V BST - SW = 5V | 148 | mΩ | ||
| R (LSD) | Low-side FET on resistance | T A = 25°C, V IN = 12V | 78 | mΩ | ||
| CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT |
| I (LIM_HS) | High side current limit | 2.5 | 3.2 | 3.9 | A | |
| I (LIM_LS) | Low side source current limit | 2 | 3 | 4.3 | A | |
| OSCILLATOR | OSCILLATOR | OSCILLATOR | OSCILLATOR | OSCILLATOR | OSCILLATOR | OSCILLATOR |
| F sw | Centre switching frequency | 390 | 500 | 630 | kHz | |
| OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION | OVER TEMPERATURE PROTECTION |
| Thermal Shutdown (1) | Rising temperature | 160 | °C | |||
| Thermal Shutdown (1) | Hysteresis | 10 | °C | |||
| Thermal Shutdown (1) | Hiccup time | 32768 | Cycles |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage range, V I | VIN | -0.3 | 30 | V |
| Input voltage range, V I | EN | -0.3 | 7 | V |
| Input voltage range, V I | FB | -0.3 | 7 | V |
| Output voltage | BOOT-SW | -0.3 | 7 | V |
| Output voltage | SW | -0.3 | 30 | V |
| Output voltage | SW (20ns transient) | -5 | 30 | V |
| Operating junction temperature, T J | Operating junction temperature, T J | -40 | 150 | °C |
| Storage temperature range, T stg | Storage temperature range, T stg | -65 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| V | Input voltage range | VIN | 4.5 | 28 | V |
| I | EN | -0.1 | 5.5 | V | |
| FB | -0.1 | 5.5 | V | ||
| V O | Output voltage range | BOOT-SW | -0.1 | 5.5 | V |
| V O | SW | -0.1 | 28 | V | |
| T J | Operating junction temperature | Operating junction temperature | -40 | 125 | °C |
Thermal Information
| THERMAL METRIC (1) | TPS54202 DDC ( SOT23) 6 PINS | UNIT | |
|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 118.6 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 63.6 | °C/W |
| R θJB | Junction-to-board thermal resistance | 34.4 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 18.5 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 33.7 | °C/W |
| R θJA_EVM | Junction-to-ambient thermal resistance on official EVM board | 57.2 | °C/W |
Typical Application
The TPS54202 device is typically used as a step-down converter, which converts an input voltage from 8V to 28V to fixed output voltage 5V.
Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| TPS54202 | DDC (SOT-23, 6) | 2.9mm × 2.8mm |
- (1) For more information, see Section 10.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
Efficiency vs Output Current
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS54202DDCR | Texas Instruments | SOT-23-6 Thin, TSOT-23-6 |
| TPS54202DDCR.A | Texas Instruments | — |
| TPS54202DDCR.B | Texas Instruments | — |
| TPS54202DDCT | Texas Instruments | — |
| TPS54202DDCT.A | Texas Instruments | — |
| TPS54202DDCT.B | Texas Instruments | — |
| TPS542XX | Texas Instruments | — |
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