ISL70002SEH Datasheet, PDF (1/23 Pages) Intersil Corporation – Rad Hard and SEE Hard 12A Synchronous Buck Regulator with Multi-Phase Current Sharing

Rad Hard and SEE Hard 12A Synchronous Buck
Regulator with Multi-Phase Current Sharing
ISL70002SEH
The ISL70002SEH 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
12A for T_J ≤ +150°C. Two ISL70002SEH devices configured to
current share can provide 19A total output current, assuming
±27% worst-case current share accuracy.
The ISL70002SEH utilizes peak current-mode control with
integrated error amp compensation and pin selectable slope
compensation. Switching frequency is also pin selectable to
either 1MHz or 500kHz. Two ISL70002SEH devices can be
synchronized 180° out-of-phase to reduce input RMS ripple
current.
High integration makes the ISL70002SEH an ideal choice to
power 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 and I/O Voltages
• Low-Voltage, High-Density Distributed Power Systems
Features
• DLA SMD#5962-12202
• 12A Output Current for a Single Device (at T_J = +150°C)
• 19A Output Current for Two Paralleled Devices
• 1MHz or 500kHz Switching Frequency
• 3V to 5.5V Supply Voltage Range
• ±1% Ref. Voltage (Line, Load, Temp. & Rad.)
• Pre-Biased Load Compatible
• Redundancy/Junction Isolation: Exceptional SET Performance
• Excellent Transient Response
• High Efficiency > 90%
• Two ISL70002SEH Synchronization, Inverted-Phase
• Comparator Input for Enable and Power-Good
• Adjustable Analog Soft-Start
• Input Undervoltage, Output Undervoltage and Adjustable
Output Overcurrent Protection
• QML Qualified per MIL-PRF-38535
• Full Mil-Temp Range Operation (-55°C to +125°C)
• Radiation Environment
- High Dose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 krad(Si)
- ELDRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 krad(Si)*
*Level guaranteed by characterization; “EH” version is
production tested to 50 krad(Si).
• SEE Hardness
- SEL and SEB LET_TH . . . . . . . . . . . . . . . . . . 86.4MeV/mg/cm²
- SEFI LET_TH. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43MeV/mg/cm²
- SET LET_TH . . . . . . . . . . . . . . . . . . . . . . . . . . 86.4MeV/mg/cm²
90
85
80
75
70
0 1 2 3 4 5 6 7 8 9 10 11 12
LOAD CURRENT (A)
FIGURE 1. EFFICIENCY 5V INPUT TO 2.5V OUTPUT, T_A = +25°C
25
CH1 MASTER LX + 20V
20
15
CH2 SLAVE LX + 15V
10
CH3 VOUT x 10
5
CH4 SYNC
0
-6 -4 -2 0 2 4 6
TIME (µs)
8 10 12 14
FIGURE 2. 2-PHASE SET PERFORMANCE at 86.4MeV/mg/cm²
April 5, 2012
1
FN8264.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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