1 Features

1• 3.1 V to 14 V Input Voltage Range

• 1 A Output Current

• Up to 91% Efficiency

• ±1.5% Output Voltage Accuracy

• Synchronous Rectification

• Low 1/f-Noise Reference System

• Noise: 22 μVRMS (10 Hz to 100 kHz)

• Output Voltage: -1 V to -5.5 V

• |VOUT| < 0.7 x VIN

• 1.5-MHz fixed frequency PWM mode

• Thermal Shutdown

• 5-μA Shutdown Current

• 3-mm × 3-mm WSON Package

• Create a Custom Design Using the TPS63710

With the WEBENCH® Power Designer

2 Applications

• Generic Negative Voltage Supply

• ADC and DAC Supply in Telecom Systems

• Bias for GaN transistors

• Optical Module Laser Diode Bias

• Noise Sensitive and Space Limited Applications

Requiring a Negative Supply Voltage

3 Description

The TPS63710 is an inverting step-down dc-dc

converter generating a negative output voltage down

to -5.5 V. It provides an output current up to 1 A,

depending on the input-voltage to output-voltage

ratio. Its filtered reference system gives low 1/f noise

which is required in high performance

telecommunication systems.

The TPS63710 operates with a fixed-frequency PWM

control topology. It has an internal current limit and a

thermal shutdown. The input voltage range of 3.1 V to

14 V allows the TPS63710 to be used in a variety of

applications where a negative output voltage is

generated from a, in absolute value, higher positive

input voltage.

Synchronous rectification provides high efficiency

especially for small output voltages like -1.8 V, which

are typically used as a negative supply voltage for

high performance DACs and ADCs. A fixed switching

frequency of 1.5 MHz allows the use of small external

components and enables a small total solution size.

The TPS63710 comes in a 3-mm × 3-mm WSON

package that provides good thermal performance in

applications running at high ambient temperature.