TPS65283

Name: TPS65283
Brand: TI
SKU: TPS65283
Price: 0.924 USD

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4.5 V to 18 V input, 3.5 A / 2.5 A, synchronous dual buck converter in FCCM mode

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Data sheet

document-pdfAcrobat TPS65283, TPS65283-1 4.5-V to 18-V Input Voltage, Maximum 3.5-A and 2.5-A Current, Synchronous Dual Buck Converter With Power Distribution Switch datasheet (Rev. E) PDF | HTML

TPS65283

ACTIVE

Data sheet

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Product details

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Iout (max) (A)

3.5

Vin (min) (V)

4.5

Vin (max) (V)

18

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

600

Features

Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable

Vout (min) (V)

0.6

Vout (max) (V)

0.5

Iq (typ) (µA)

500

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Iout (max) (A)

3.5

Vin (min) (V)

4.5

Vin (max) (V)

18

Switching frequency (min) (kHz)

200

Switching frequency (max) (kHz)

600

Features

Adjustable current limit, Enable, Frequency synchronization, Power good, Soft-start fixed, Synchronous rectification, UVLO adjustable

Vout (min) (V)

0.6

Vout (max) (V)

0.5

Iq (typ) (µA)

500

VQFN (RGE)

24

16 mm² 4 x 4

Buck Converter
- Wide input voltage range 4.5 to 18 V
- Integrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)
- Feedback reference voltage 0.6 V ±1%
- Adjustable switching frequency 200 kHz to
  2 MHz
- Internal built soft start time 2.4 ms
- External clock synchronization
- Cycle-by-cycle current limit
- Power good indicator for each buck
- Continuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light load
Power distribution switch
- Integrated a power distribution switch with on-resistance 60 mΩ
- Operating input voltage range 2.4 to 6 V
- Adjustable current limiting up to 2.7 A
- Current-limit accuracy ±10% at 1.25 A (typical)
- Auto recovery overcurrent protection
- Reverse input to output voltage protection
- Overtemperature protection
- 24-lead VQFN (RGE) 4-mm × 4-mm package

Buck Converter
- Wide input voltage range 4.5 to 18 V
- Integrated dual buck converter, maximum continuous current 3.5 A (Buck1) / 2.5 A (Buck2)
- Feedback reference voltage 0.6 V ±1%
- Adjustable switching frequency 200 kHz to
  2 MHz
- Internal built soft start time 2.4 ms
- External clock synchronization
- Cycle-by-cycle current limit
- Power good indicator for each buck
- Continuous current mode (TPS65283) or pulse skipping mode (PSM) (TPS65283-1) at light load
Power distribution switch
- Integrated a power distribution switch with on-resistance 60 mΩ
- Operating input voltage range 2.4 to 6 V
- Adjustable current limiting up to 2.7 A
- Current-limit accuracy ±10% at 1.25 A (typical)
- Auto recovery overcurrent protection
- Reverse input to output voltage protection
- Overtemperature protection
- 24-lead VQFN (RGE) 4-mm × 4-mm package

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required.

The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions.

Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.

The TPS65283, TPS65283-1 in thermally-enhanced 4-mm × 4-mm VQFN package is a full featured
4.5- to 18-V Vin, 3.5-A/2.5-A output current synchronous step down DC-DC converter, which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. The device also incorporates one N-channel MOSFET power switches for power distribution systems. This device provides a total power distribution solution, where precision current limiting and fast protection response are required.

The 60-mΩ independent power distribution switch limits the output current to a programmable current limit threshold by using an external resistor. The current limit accuracy can be achieved as tight as ±10% at typical 1.25 A. The nFAULT output asserts low under overcurrent and reverse-voltage conditions.

Constant frequency peak current mode control in DC-DC converter simplifies the compensation and optimizes transient response. Cycle-by-cycle overcurrent protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading conditions. When die temperature exceeds thermal over loading threshold, the overtemperature protection shuts down the device.

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	Type	Title		Date
*	Data sheet	TPS65283, TPS65283-1 4.5-V to 18-V Input Voltage, Maximum 3.5-A and 2.5-A Current, Synchronous Dual Buck Converter With Power Distribution Switch datasheet (Rev. E)	PDF \| HTML	27 Jan 2019

Design & development

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Evaluation board

TPS65283EVM-646 — TPS65283EVM Evaluation Module

The TPS65283EVM-646 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65283. The max DC output current of this EVM is 3.5A and 2.5A. -The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features. -It also has EN1, (...)

User guide: PDF