Picor Corporation • picorpower.com

PI2061

Rev 1.4



PI2061

Cool-Switch® Series

High Side High Voltage Load Disconnect Switch Controller IC

Description

The PI2061 is a high-speed electronic circuit breaker

controller IC designed for use with N-channel MOSFETs in

high side load disconnect switch solutions for medium

voltage applications. The PI2061 Cool-Switch® controller

enables an extremely low power loss solution with fast

dynamic response to an over current fault or EN Low

conditions.

Once enabled, the PI2061 monitors the MOSFET current

through a sense resistor.

If an over current level is

sensed, the switch is quickly latched off to prevent the

power source from being overloaded. Bringing the EN

pin low will reset the over current latch allowing retry. To

avoid false tripping by the in-rush current, the over

current level is approximately doubled during start up,

until SN approaches about 0.8V below VC. The PI2061

has an internal charge pump to drive the gate of a high

side N-Channel MOSFET above the VC input. There is an

internal shunt regulator that regulates the VC input with

respect to the SGND pin for applications higher than 11

volts.

Features



Programmable latching over-current detection



Fast 120ns disconnect response to a load short



Fast disable via EN pin, typically 200ns.



4A gate discharge current



Internal charge pump



Fault status indication

Applications



Telecom System, ≤80V operation & 100V/100ms

Transient



N+1 Redundant Power Systems



Servers & High End Computing



High Side Circuit Breaker and Load Disconnect

Package Information

The PI2061 is offered in the following package:



10 Lead 3mm x 3mm DFN package

Table of Contents:



Pin Description

2



Electrical Specifications

3



Functional Description

5



Block Diagram

6



State Diagram

7



Typical Characteristics Plots

8



Application Information

9



12V Typical Application Example

12



48V Typical application Example

13



Layout Recommendation

14



Package Drawings

15



Ordering Information

15

Typical Application:

Figure 1: PI2061 in High Side Disconnect switch application

Figure 2: PI2061 response time to output short fault condition

Vin

PGND

SN

SGND

PI2061

1

7

0.1µF

4

9

FT

EN

5

RTN

VC

3

FT

VC

Vout

Iout

D1

GATE

6

2

SP

D2

Event: Output Short

Vin

Vout

120ns

Over Current detection

MOSFET Turn Off Time

0A

0V

Output Current

Current Trip Level

Not Recommended for New Designs