DICE/DWF SPECIFICATION

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DICE PINOUT

DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

113mils

Backside Metal: Alloyed Gold Layer

Backside Potential: GND

DIE CROSS REFERENCE

LTC

Part Number

Order

Part Number

RH3845MK

RH3845MK

RH3845MK DICE

RH3845MK DWF*

Please refer to LTC standard product data sheet for

other applicable product information.

*DWF = DICE in wafer form.

RH3845MK

High Voltage Synchronous

Step-Down Controller

PAD FUNCTION

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

SHDN

MODE

SYNC

GND

GND

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

GND

PGND

BG

SW

TG

BOOST

GND

The RH3845MK is a high voltage, synchronous, current

mode controller for medium to high power, high efficiency

supplies. It offers a wide 4V to 60V input range (7.5V

minimum start-up voltage). An onboard regulator sim-

plifies the biasing requirements by providing IC power

Additional features include an adjustable fixed operating

frequency synchronizable to an external clock for noise

sensitive applications, gate drivers capable of driving large

N-channel MOSFETs, a precision undervoltage lockout,

low shutdown current, short-circuit protection, and a

programmable soft-start.

(Note 1)

BOOST ......................................................................80V

BOOST to SW............................................................24V

SHDN Pin Current ....................................................1mA

Operating Junction Temperature Range...–55°C to 125°C

Storage Temperature Range................... –65°C to 150°C

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