AP63357
Synchronous Buck ConverterThe AP63357 is a synchronous buck converter from Diodes Incorporated. View the full AP63357 datasheet below including key specifications, absolute maximum ratings.
AP63357 shares its datasheet with AP63357DV-7, whose page lists every part number it covers.
Official AP63357 datasheet (PDF) — the source this page was extracted from.
AP63357 Key Specifications
| Parameter | Value |
|---|---|
| Soft-Start Time | 4ms |
| Reference Voltage | 0.8V ±1% |
| Package Dimensions | 3mm x 2mm |
| Peak Current Limit | 4.0A to 6.0A (5.0A typ) |
| Input Voltage Range | 3.8V to 32V |
| Switching Frequency | 450kHz (400kHz to 500kHz) |
| Output Voltage Range | 0.8V to 31V |
| Low-Side MOSFET RDS(On) | 40mΩ |
| Thermal Resistance θJA | 25°C/W |
| High-Side MOSFET RDS(On) | 74mΩ |
| Continuous Output Current | 3.5A |
| Quiescent Current (AP63357) | 22µA |
| Operating Ambient Temperature | -40°C to +85°C |
| Operating Junction Temperature | -40°C to +125°C |
AP63357 Overview
Part: AP63357DV-7 (AP63356/AP63357 family) — Diodes Incorporated
Type: Synchronous Buck Converter
Description: 3.8–32 V input, 3.5 A synchronous buck converter with integrated 74 mΩ high-side and 40 mΩ low-side MOSFETs, 450 kHz switching frequency, and 22 μA typical quiescent current (AP63357, PFM mode).
Operating Conditions:
- Supply voltage: 3.8–32 V
- Operating ambient temperature: -40 to +85 °C (operating junction temperature -40 to +125 °C)
- Output voltage range: 0.8–31 V
Absolute Maximum Ratings:
- Max supply voltage (VIN): 35.0 V DC; 40.0 V for 400 ms
- Max junction temperature: +170 °C
- Storage temperature: -65 to +150 °C
Key Specs:
- Shutdown supply current: 1 μA typ, 3 μA max (VEN = 0 V)
- Quiescent supply current: 258 μA typ (AP63356), 22 μA typ (AP63357), VEN floating, VFB = 1.0 V
- Feedback voltage: 0.792 / 0.800 / 0.808 V (min/typ/max)
- Oscillator frequency: 400 / 450 / 500 kHz (min/typ/max)
- High-side peak current limit: 4.0 / 5.0 / 6.0 A (min/typ/max)
- Low-side valley current limit: 3.2 / 4.2 / 5.2 A (min/typ/max)
- VIN UVLO rising threshold: 3.5 V typ (3.3–3.6 V), 420 mV hysteresis
- Minimum on-time: 100 ns typ, 120 ns max
- Soft-start time: 4 ms typ
- Thermal resistance θJA: 25 °C/W (V-DFN3020-13)
Features:
- 3.5 A continuous output current
- Proprietary gate driver design for EMI reduction
- Frequency spread spectrum with ±6% jitter
- AP63356: forced PWM regardless of load
- AP63357: PFM at light load, up to 86% efficiency at 5 mA
- Peak current mode control with integrated loop compensation
- Low-dropout (LDO) mode
- Power good indicator with 5 MΩ internal pull-up
- Precision enable threshold for adjustable UVLO
- Protection: UVLO, output undervoltage, cycle-by-cycle current limit, thermal shutdown (170 °C)
- Lead-free, RoHS compliant, halogen and antimony free
Applications:
- 5 V, 12 V, and 24 V distributed power bus supplies
- Flat screen TVs and monitors
- Power tools and laser printers
- White goods and small home appliances
- FPGA, DSP, and ASIC supplies
- Home audio
- Network systems
- Gaming consoles
- Consumer electronics
- General purpose point of load
Package:
- V-DFN3020-13 (3 mm × 2 mm)
AP63357 Features
- VIN 3.8V to 32V
- 3.5A Continuous Output Current
- 0.8V ± 1% Reference Voltage
- 22μA Low Quiescent Current (Pulse Frequency Modulation)
- 450kHz Switching Frequency
- Pulse Width Modulation (PWM) Regardless of Output Load
- o AP63356
- Supports Pulse Frequency Modulation (PFM)
- o AP63357
- o Up to 86% Efficiency at 5mA Light Load
- Proprietary Gate Driver Design for Best EMI Reduction
- Frequency Spread Spectrum (FSS) to Reduce EMI
- Low-Dropout (LDO) Mode
- Power Good Indicator with 5MΩ Internal Pull-up
- Precision Enable Threshold to Adjust UVLO
- Protection Circuitry
- o Undervoltage Lockout (UVLO)
- o Output Undervoltage Protection (UVP)
- o Cycle-by-Cycle Peak Current Limit
- o Thermal Shutdown
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. 'Green' Device (Note 3)
AP63357 Applications
- 5V, 12V, and 24V Distributed Power Bus Supplies
- Flat Screen TV Sets and Monitors
- Power Tools and Laser Printers
- White Goods and Small Home Appliances
- FPGA, DSP, and ASIC Supplies
- Home Audio
- Network Systems
- Gaming Consoles
- Consumer Electronics
- General Purpose Point of Load
AP63357 Pin Configuration
AP63357 Absolute Maximum Ratings
| Symbol | Parameter | Rating | Unit |
|---|---|---|---|
| VIN | Supply Pin Voltage | -0.3 to +35.0 (DC) | V |
| VIN | Supply Pin Voltage | -0.3 to +40.0 (400ms) | V |
| V EN | Enable/UVLO Pin Voltage | -0.3 to +35.0 | V |
| V FB | Feedback Pin Voltage | -0.3 to +6.0 | V |
| V COMP | Compensation Pin Voltage | -0.3 to +6.0 | V |
| V PG | Power-Good Pin Voltage | -0.3 to +6.0 | V |
| V BST | Bootstrap Pin Voltage | V SW - 0.3 to V SW + 6.0 | V |
| V SW | Switch Pin Voltage | -0.3 to VIN + 0.3 (DC) | V |
| V SW | Switch Pin Voltage | -2.5 to VIN + 2.0 (20ns) | V |
| T ST | Storage Temperature | -65 to +150 | °C |
| T J | Junction Temperature | +170 | °C |
| T L | Lead Temperature | +260 | °C |
| ESD Susceptibility (Note 5) | ESD Susceptibility (Note 5) | ESD Susceptibility (Note 5) | ESD Susceptibility (Note 5) |
| HBM | Human Body Model | 2000 | V |
| CDM | Charged Device Model | 1000 | V |
Notes:
-
Stresses greater than the Absolute Maximum Ratings specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
-
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices.
AP63357 Recommended Operating Conditions
| Symbol | Parameter | Min | Max | Unit |
|---|---|---|---|---|
| VIN | Supply Voltage | 3.8 | 32 | V |
| VOUT | Output Voltage | 0.8 | 31 | V |
| T A | Operating Ambient Temperature Range | -40 | +85 | °C |
| T J | Operating Junction Temperature Range | -40 | +125 | °C |
Note: 7. The device function is not guaranteed outside of the recommended operating conditions.
AP63357 Thermal Information
| Symbol | Parameter | Rating | Rating | Unit |
|---|---|---|---|---|
| θ JA | Junction to Ambient | V-DFN3020-13 (Type A) | 25 | °C/W |
| θ JC | Junction to Case | V-DFN3020-13 (Type A) | 5 | °C/W |
Note: 6. Test condition for V-DFN3020-13: Device mounted on FR-4 substrate, four-layer PC board, 2oz copper, with minimum recommended pad layout.
AP63357 Typical Application
Figure 1. Typical Application Circuit
Figure 2. AP63356 Efficiency vs. Output Current
VIN = 12V, VOUT = 5V, L = 6.8μH
VIN = 12V, VOUT = 3.3V, L = 4.7μH
Figure 3. AP63357 Efficiency vs. Output Current
AP63357 Package Information
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| AP63357DV-7 | Diodes Incorporated | 13-PowerVFDFN |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- LM2596 – Texas Instruments, 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 Diodes datasheets (217)
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