Datasheet
ISL71001SLHM
Radiation Hardened 6A Synchronous Buck Regulator with Integrated MOSFETs
The ISL71001SLHM is a radiation hardened and
high-efficiency monolithic synchronous buck regulator
Features
▪ Production testing and qualification follow the
AS6294/1 standard (see Radiation Hardened
Plastic Production and QCI Flow)
▪ Passes NASA low outgassing specifications
▪ Operates from 3V to 5.5V supply
▪ Current mode controlled feedback
▪ Fixed 1MHz switching frequency
▪ ±1.2% reference voltage
with integrated MOSFETs. This single-chip power
solution operates across an input voltage range of 3V
to 5.5V and provides a tightly regulated output voltage
that is externally adjustable from 0.8V to ~85% of the
input voltage with an output load current capacity of
6A. The ISL71001SLHM is available in a plastic 64 Ld
Thin Quad Flatpack (EP-TQFP) package.
The ISL71001SLHM uses peak current-mode control
for excellent output load transient response and
features integrated compensation and switches at a
fixed frequency of 1MHz to reduce component size
and count. In applications where two regulators are
needed, two ISL71001SLHM devices can be
synchronized 180° out-of-phase to reduce the overall
input RMS ripple current. The internal synchronous
power switches are optimized for high efficiency and
good thermal performance.
▪ Highly efficient: 95% peak efficiency
▪ SYNC pin allows synchronization of two devices
▪ Adjustable output voltage
▪ Output undervoltage and output overcurrent
protection with power-good output voltage monitor
▪ Radiation acceptance testing - ISL71001SLHM
• 75krad(Si) at a low dose rate (< 10mrad(Si)/s)
▪ SEE hardness (see SEE report for details)
The ISL71001SLHM incorporates fault protection for
the regulator. The protection circuits include input
undervoltage, output undervoltage, and output
overcurrent.
2
• Single-event effects at LET = 86MeV•cm /mg
Applications
▪ FPGA, CPLD, DSP, CPU Core, or I/O voltages
High integration makes the ISL71001SLHM an ideal
choice to power many of today’s small form factor
applications. Two devices can be synchronized to
provide a complete power solution for large-scale
digital ICs, like Field Programmable Gate Arrays
(FPGAs), that require separate core and I/O voltages.
▪ Low-voltage, high-density distributed power
systems
▪ Medium/Geostationary Earth Orbit (MEO/GEO)
▪ Launch Vehicles and High Altitude Avionics
100
95
90
3.3V
ISL71001SLHM
SYNC
CORE
85
SYNC
80
I/O
FPGA
ISL71001SLHM
3.3VIN
4
5VIN
75
70
LDO
AUX
0
1
2
3
5
6
I
(A)
OUT
Figure 2. Efficiency vs VIN for 2.5V Output, TC = +25°C
Figure 1. Typical Application
R34DS0014EU0101 Rev.1.1
Aug 10, 2021
Page 1
© 2021 Renesas Electronics
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