RAD HARD 4.5A,

500KHZ STEP DOWN

SWITCHING REGULATOR

CONTROLLER

FEATURES:

• Manufactured using

Rad Hard RH1959MILDICE

• Radiation Hardened to 100 Krad(Si) (Method 1019.7 Condition A)

• Low Dose Rate Hardened to 50 Krad(Si) (Method 1019.7 Condition D)

• 500KHz Constant Switching Frequency: Synchronizable to 1MHz

• 4.5A Integrated Switch

• Internal Slope Compensation

• Input Voltage Range from 4.3V to 16V

• Cycle by Cycle Current Limit

• Output Voltages Down to 1.21V

• Available to DSCC SMD 5962R11234

• Single Event Effect Tested

• Non RAD Hard EDU devices available

• Equivalent Non Rad Hard Device MSK5032

DESCRIPTION:

The MSK5059RH is a radiation hardened 500KHz switching regulator controller capable of delivering up to 4.5A of current

to the load. A fixed 500KHz switching frequency allows the use of smaller inductors reducing required board space for a

given design. The 4.5A integrated switch leaves only a few application specific components to be selected by the designer.

The MSK5059RH simplifies design of high efficiency radiation hardened switching regulators that use a minimum amount

of board space. The device is packaged in a hermetically sealed 16 pin flatpack and is available with straight or gull wing

leads.

1

1 VINA

2 VINB

3 VINC

4 VIND

5 VINE

6 BOOST

7 FB

8 GND

16

SWA

15

SWB

14

SWC

13

SWD

12

SWE

11

SYNC

10

SHDN

9

VC

• POL Applications

• Satellite System Power Supply

• Step Down Switching Regulator

• Microprocessor, FPGA Power Source

• High Efficiency Low Voltage Subsystem Power Supply

MIL-PRF-38534 AND 38535 CERTIFIED FACILITY

8548-31 Rev. L 8/17

5059RH

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

PIN-OUT INFORMATION

CASE=ISOLATED