1 Features

• 4.5V to 28V input voltage range

• 0.6V to 5.5V output voltage range

• 8A continuous output current capability

• Integrated MOSFETs, inductor, and basic passives

• 0.6V ±1% reference voltage at 25°C

• D-CAP3™ control mode for fast transient response

• TPSM86838 with FCCM for pseudo-fixed

frequency with lower output ripple

• TPSM86837 with Eco-mode for high light-load

efficiency

• Adjustable soft-start time by SS capacitor

• Built-in output discharge function

• Selectable 800kHz and 1200kHz switching

frequency

• Power-good indicator to monitor output voltage

• Supports up to 98% duty operation

• Non-latched protections for UV, OV, OT and UVLO

• –40°C to +150°C operating junction temperature

• 19-pin 5.0mm × 5.5mm QFN HotRod™ package

2 Applications

• Industrial applications: medical applications,

factory automation and control (IPC, robotics), test

and measurements, pro audio video

• Space constrained POL for 12V,19V, and 24V

power-bus applications

3 Description

The TPSM8683x is a high-efficiency, high-voltage

input, easy-to-use, synchronous buck power module.

The device integrates power MOSFETs, a shielded

inductor, and basic passives, minimizing the design

size.

With the wide operating input voltage range of

4.5V to 28V, this device is an excellent choice for

systems powered from 12V, 19V, 24V power-bus rails.

TPSM8683x supports up to 8A continuous output

current, which output voltage is between 0.6V and

5.5V.

The TPSM8683x uses DCAP3 control mode to

provide fast transient response, good line and load

regulation, no requirement for external compensation,

and supports low equivalent series resistance (ESR)

output capacitors like MLCC.

The TPSM86838 operates in forced continuous

conduction mode (FCCM) during light load which

maintains lower output ripple during all load

conditions. TPSM86837 operates at Eco-mode to

attain high efficiency at light load.

The TPSM8683x provides complete non-latched OV

(Undervoltage), UV (Undervoltage), OC (Overcurrent),

OT (Overtemperature), and UVLO (Undervoltage

lockout) protections combined with power-good

indicator and output discharge function features.

The TPSM8683x is available in a 19-pin 5.0mm

× 5.5mm HotRod QFN package, and the junction

temperature is specified from –40°C to 150°C.