ISL95210 Datasheet, PDF (1/19 Pages) Intersil Corporation – 10A Synchronous Buck Regulator with Integrated Power MOSFETs

10A Synchronous Buck Regulator with Integrated
Power MOSFETs that Requires No Compensation
ISL95210
The ISL95210 single-output integrated MOSFET regulator
provides a precision voltage regulation system for point-of-load
applications. It implements a 2-bit DAC reference with tri-state
inputs for selecting a variety of regulator output voltages.
Additionally, an external resistor divider or digital voltage margining
may be used to accurately set the output voltage to a value other
than the pre-selected DAC voltages. An additional tri-state input pin
is used to set the frequency to three pre-selected values with no
need for external components.
The ISL95210 implements a modified version of Intersil’s
previous high performance R³â„¢ modulator topology in the new
R⁴™ modulator. This modulation scheme provides improved
transient performance, while also including key performance
updates that remove the need for loop compensation and
produce highly accurate switching frequencies. These updates,
along with an integrated digital feature set, allow for a
high-performance regulator that is highly compact and needs few
external components.
Protection features of this integrated regulator IC include a set of
sophisticated overvoltage, undervoltage, overcurrent and thermal
protections. Combined, these features provide advanced protection
for the load and power system.
Related Literature
• See AN1485, “ISL95210 10A Integrated FET Regulator
Evaluation Board Setup Procedure”
Features
• True 10A Solution up to +90°C Ambient with No Air Flow
• Excellent Efficiency
- 95% Peak
- 87% at 800kHz, 10A and 1.05V_OUT
• Best in Class MOSFET r_DS(ON)
- 15mΩ High-Side
- 4mΩ Low-Side
• ±0.6% Output Voltage Accuracy Over-Temperature
• Intersil’s R⁴™ Modulator Technology
- Optimal Transient Response
- No Compensation Required
• Full Digital Feature Set for Minimal Component Count
• DAC Output Voltage Control with Margining
• 32 Lead, 6mmx4mm QFN Package
Applications
• Notebook Computers
- V_DDQ for DDR1/2/3
- Chipset Voltages
• MXM Graphics Card Modules
• Point of Load Applications
• General Purpose Applications
+3.3V to +5V
+5V
C_IN
10µF
VIN
PVCC
PG_OUT
ISL95210
PHASE
EN
PG_IN
VOUT
VCC
VSEL0
VSEL1
MPCT
MSEL
AGND
FCCM
FSET _{T-PAD PGND}
L_OUT
420nH
(KELVIN)
1µF
(KELVIN)
+1.2V
C_OUT
220µF
FIGURE 1. ISL95210 TYPICAL 800kHz APPLICATION
ISL95210 THERMAL PERFORMANCE
12
AIR FLOW
0 LFM
10
100 LFM
200 LFM
8
300 LFM
6
4
2
0
85 90 95 100 105 110 115 120 125
AMBIENT TEMPERATURE (°C)
FIGURE 2. KEY PERFORMANCE CURVE
June 2, 2011
1
FN6938.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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