UCD7100 Digital Control Compatible Single Low-Side

±4-A MOSFET Driver with Current Sense

1 Features

• Adjustable current limit protection

• 3.3-V, 10-mA internal regulator

• DSP/µC compatible inputs

• 10-ns typical rise and fall times with 2.2-nF loads

• 25-ns input-to-output propagation delay

• 25-ns current sense to output delay

• Programmable current limit threshold

• Digital output current limit flag

• 4.5-V to 15-V supply voltage range

• Rated from –40°C to 105°C

• Lead(Pb)-free packaging

2 Applications

• Digitally controlled power supplies

• DC/DC converters

• Motor controllers

• Line drivers

3 Description

The UCD7100 device is part of the UCD7K family of

digital control compatible drivers for applications that

use digital control technology that requires fast local

peak current limit protection.

The UCD7100 is a low-side ±4-A high-current

MOSFET gate driver. It allows the digital power

controllers such as UCD9110 or UCD9501 to interface

to the power stage in single ended topologies. It

provides a cycle-by-cycle current limit function with

programmable threshold and a digital output current

limit flag which can be monitored by the host

controller. With a fast 25-ns cycle-by-cycle current

limit protection, the driver can turn off the power stage

in the unlikely event that the digital system can not

respond to a failure situation in time.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

UCD7100

HTSSOP (14)

5.00 mm x 4.40 mm

UCD7100A

HTSSOP (14)

5.00 mm x 4.40 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

14

12

8

OUT

CS

3

4

2

5

6

3V3

AGND

IN

CLF

ILIM

UCD7100PWP

Bias

Winding

VIN

VOUT

VDD

2

Isolation

Amplifier

PWMB

INT

Digital Controller

PWMA

VDD

AN2

AN3

AN1

AGND

Communication

Simplified Schematic

UCD7100

SLUS651E – MARCH 2005 – REVISED NOVEMBER 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.