1

1.5A, Rad Hard, Positive, High Voltage LDO

ISL75052SEH

The ISL75052SEH is a radiation hardened, single output LDO

specified for an output current of 1.5A. The device operates from

an input voltage range of 4.0V to 13.2V and provides for output

voltages of 0.6V to 12.7V. The output is adjustable based on a

resistor divider setting. Dropout voltages as low as 75mV (at

0.5A) typical can be realized using the device. This allows the

The ENABLE feature allows the part to be placed into a low

operates with a low ground current of 11mA (typ), which provides

for operation with Low Quiescent Power consumption.

The device has superior transient response and is designed

keeping Single Event Effects in mind. This results in reduction of

the magnitude of SET seen on the output. There is no need for

additional protection diodes and filters.

COMP pin is provided to enable the use of external

compensation. This is achieved by connecting a resistor and

capacitor from COMP to ground. The device is stable with

Tantalum capacitors as low as 47µF (KEMET T525 series) and

provides excellent regulation all the way from no Load to full

Load. The programmable soft-start allows one to program the

inrush current by means of the decoupling capacitor used on the

BYP pin. The OCP pin allows the short circuit output current limit

threshold to be programmed by means of a resistor from OCP pin

to GND. The OCP setting range is from a 0.16A min to 3.2A max.

The resistor sets the constant current threshold for the output

under fault conditions. The thermal shutdown disables the output

if the device temperature exceeds the specified value, it will

subsequently enter a ON/OFF cycle till the fault is removed.

Applications

• LDO regulator for Space Power Systems

• DSP, FPGA and µP Core Power Supplies

• Post Regulation of SMPS and Down Hole Drilling

Features

•DLA SMD 5962-13220

• Input supply range 4.0V to 13.2V.

• Best in class Accuracy ±1.5%

- Over line, load and temperature

• Ultra Low Dropout:

- 75mV Dropout (typ) @ 0.5A

- 225mV Dropout (typ) @ 1.5A

• SET mitigation with no added filtering/diodes

• Externally adjustable Output Voltage

• PSRR 65dB (typ) @ 1kHz

• ENable and PGood Feature

• Programmable Soft-Start/In-rush Current Limiting

• Adjustable Overcurrent Protection

• Over-Temperature Shutdown

• Stable with 47µF Min Tantalum Capacitor

• Package 16 Ld Flat Pack

• Radiation Environment

- High Dose Rate (50-300rad(Si)/s) . . . . . . . . . 100krad(Si)

- Low Dose Rate (0.01rad(Si)/s). . . . . . . . . . . . 100krad(Si)*

*Product capability established by initial characterization. The

"EH" version is acceptance tested on a wafer-by-wafer basis to

50krad(Si) at low dose rate.

Related Literature

See AN1850, "ISL75052SEH Evaluation Board User's Guide"

See AN1851, "SEE Testing of the ISL75052SEH"

See AN1852, "Radiation Report of the ISL75052SEH"

FIGURE 1. TYPICAL APPLICATION

15.8k

4.87k

2.2k

2.2n

VOUT

2.5V

300

EN

VIN

1nF

PG

VIN

3,4,5

ISL75052SEH

16

15

14

13

8

10

12

9

VOUT

VIN

OCP

PG

COMP

VCCX

GND

EN

ADJ

BYP

1,2

22k

22k

0.1µF

0.1µF

200µF

0.1µF

0.1µF

200µF

Ω

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0

0.5

1.0

1.5

2.0

+125°C

+150°C

25°C

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners

May 29, 2013

FN8456.0