ISL70001SEH Datasheet, PDF (1/17 Pages) Intersil Corporation – Rad Hard and SEE Hard 6A Synchronous Buck Regulator

Rad Hard and SEE Hard 6A Synchronous Buck Regulator
ISL70001SEH
The ISL70001SEH 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.
High integration and class leading radiation tolerance makes
the ISL70001SEH 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.
Applications
• FPGA, CPLD, DSP, CPU Core or I/O Voltages
• Low-Voltage, High-Density Distributed Power Systems
Related Literature
• ISL70001SRHEVAL1Z Evaluation Board, AN1518
Specifications for Rad Hard QML devices are controlled by the
Defense Logistics Agency Land and Maritime (DLA). 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. This link is also available on the
ISL70001SEH device information page on the Intersil web site.
Features
• ±1% Reference Voltage Over Line, Load, Temperature and
Radiation
• Current Mode Control for Excellent Dynamic Response
• Full Mil-Temp Range Operation (T_A = -55°C to +125°C)
• High Efficiency > 90%
• Fixed 1MHz Operating Frequency
• Operates from 3V to 5.5V Supply
• Adjustable Output Voltage
- Two External Resistors Set V_OUT from 0.8V to ~85% of V_IN
• 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
• Electrically Screened to DLA SMD 5962-09225
• QML Qualified per MIL-PRF-38535 Requirements
• Radiation Hardness
- Total Dose [50-300rad(Si)/s] . . . . . . . . . . .100krad(Si) min
- Total Dose [<10mrad(Si)/s] . . . . . . . . . . . . .50krad(Si) min
• SEE Hardness
- SEL and SEB LET_eff . . . . . . . . . . . . 86.4MeV/mg/cm² min
- SEFI X-section (LET_eff = 86.4MeV/mg/cm²) 1.4 x 10^-6 cm²
max
- SET LET_eff (< 1 Pulse Perturbation) 86.4MeV/mg/cm² min
5V SUPPLY
ISL70001SEH
SYNCH
RAD HARD LDO
ISL70001SEH
CORE
AUX
RAD TOLERANT
FPGA
I/O
FIGURE 1. TYPICAL APPLICATION
95
90
85
80
75
70
0
1
2
3
4
5
6
LOAD CURRENT (A)
FIGURE 2. EFFICIENCY 5V INPUT TO 3.3V OUTPUT, T_A = +25°C
November 30, 2011
1
FN7956.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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