High reliability PE991510 pages

High-Reliability Power Management
January 2013

UltraCMOS® Point-of-Load DC-DC Buck Regulators
For Space Application

Peregrine Semiconductor’s UltraCMOS® Silicon-onSapphire (SOS) technology has achieved significant
performance milestones in manufacturability, reliability and
RF performance, and has inherent advantages that make
it a good choice for demanding High-Reliability designs.
UltraCMOS® products address the stringent low-power
requirements of telecom, infrastructure, microwave and
VSAT military radios, radar and ECM space systems, and test
instrumentation applications. Screening is available for
commercial and military space applications.

Also Available as Die

The New PE9915x Family
The PE9915x products are radiation-hardened point-ofload (POL) buck regulators that deliver high efficiency and
output currents up to 2/6/10 A (continuous) from VIN = 5V
(4.6 - 6.0V). A minimal external component count and high
switching frequency enables greater than 10 W/in2 standard
PCB designs. Integrated synchronous MOSFET switches
cut BOM cost and produce peak effciencies of ≥ 93%, while
minimizing thermal loads.

Integrated synchronous FET switches with 93% peak
efficiency
Peak current mode control and voltage mode control for
wide loop bandwidth and excellent load step response
Better than 1% initial accuracy at 25°C
Powers up into pre-biased loads allowing safe start-up
with load applied
Adjustable switching frequency (100 kHz to 5 MHz) allows
operation at the optimum frequency to minimize RF spur
impact and minimize inductor size and weight

PRODUCT FEATURES

Inverted sync buffer pin for easy poly-phase operation,
enabling ripple reduction and faster loop response

Typical Application Diagram
PE99155
VIN

VIN
CIN

10K

ICOMP

SDb

OUT

SYNC

EAINM

VREF
Cbyp

ISET
CC2

CC

SScap
SSCAP
(opt)

RFB2

EAINP

EAOUT
RC

LOUT
RFB1

PGOOD

PGOOD

RCOMP

AGND

RSEL
RSET
GND

RSET
(opt)

CC3
(opt)

VOUT
COUT

Adjustable Soft-Start with external capacitor to adjust
load voltage/current rise-time
Integrated Power Good pin for sequencing and telemetry
Shutdown function pin for remote on/off control
Accurate and simple current sharing for higher power
loads
Adjustable current threshold and over current protection
N+K redundant control through simple enable pin
Hermetic ceramic package with exposed thermal pad

Find Out More: dcdc.psemi.com

The UltraCMOS® process does not exhibit enhanced lowdose-rate (ELDRS) since bipolar minority carrier elements
are not used