ISL70001SRH Datasheet, PDF (1/16 Pages) Intersil Corporation – Radiation Hardened and SEE Hardened 6A Synchronous Buck Regulator with Integrated MOSFETs

Radiation Hardened and SEE Hardened 6A
Synchronous Buck Regulator with Integrated
MOSFETs
ISL70001SRH
The ISL70001SRH is a radiation hardened and SEE
hardened high efficiency monolithic synchronous buck
regulator with integrated MOSFETs. This single chip
power solution operates over 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. Output load current
capacity is 6A for T_J < +145°C.
The ISL70001SRH utilizes peak current-mode control
with integrated compensation and switches at a fixed
frequency of 1MHz. Two ISL70001SRH devices can be
synchronized 180° out-of-phase to reduce input RMS
ripple current. These attributes reduce the number and
size of external components required, while providing
excellent output transient response. The internal
synchronous power switches are optimized for high
efficiency and good thermal performance.
The chip features a comparator type enable input that
provides flexibility. It can be used for simple digital
on/off control or, alternately, can provide
undervoltage lockout capability by precisely sensing
the level of an external supply voltage using two
external resistors. A power-good signal indicates
when the output voltage is within ±11% typical of the
nominal output voltage.
Regulator start-up is controlled by an analog soft-start
circuit, which can be adjusted from approximately 2ms
to 200ms using an external capacitor.
The ISL70001SRH incorporates fault protection for
the regulator. The protection circuits include input
undervoltage, output undervoltage and output
overcurrent.
High integration makes the ISL70001SRH 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.
Specifications for Rad Hard QML devices are
controlled by the Defense Supply Center in
Columbus (DSCC). The SMD numbers listed in the
Ordering Information Table on page 2 must be
used when ordering.
Detailed Electrical Specifications for these
devices are contained in SMD 5962-09225. A link
is provided on our website for downloading.
Features
• Electrically Screened to DSCC SMD 5962-09225
• QML Qualified per MIL-PRF-38535 Requirements
• Full Mil-Temp Range Operation (T_A = -55°C to
+125°C)
• Radiation Hardness
- Total Dose [50-300rad(Si)/s] . . . 100krad(Si) min
• SEE Hardness
- SEL and SEB LET_eff . . . . . . 86.4MeV/mg/cm² min
- SE1F.I4Xx-s1e0c_-t₆iocnm(₂LEmT_eafxf = 86.4MeV/mg/cm²)
- SE8T6.L4EMT_{eefVf /(m<g1/cPmul2}semPinerturbation)
• High Efficiency > 90%
• Fixed 1MHz Operating Frequency
• Operates from 3V to 5.5V Supply
• ±1% Reference Voltage over Line, Load,
Temperature and Radiation
• Adjustable Output Voltage
- Two External Resistors Set V_OUT from 0.8V to
~85% of V_IN
• Excellent Dynamic Response
• Bi-directional SYNC Pin Allows Two Devices to be
Synchronized 180° Out-of-Phase
• Device Enable with Comparator Type Input
• Power-Good Output Voltage Monitor
• Adjustable Analog Soft-Start
• Input Undervoltage, Output Undervoltage and
Output Overcurrent Protection
• Starts Into Pre-Biased Load
Applications*(see page 16)
• FPGA, CPLD, DSP, CPU Core or I/O Voltages
• Low-Voltage, High-Density Distributed Power
Systems
December 15, 2009
FN6947.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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