ISL91211

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Triple/Quad Output Power Management IC

OVERVIEW

The ISL91211A is a 4-phase, three output programmable Power Management IC (PMIC) and the ISL91211B is a 4-phase, four output programmable PMIC. They are optimized with highly efficient, synchronous buck converters capable of multiphase and single-phase operations that can deliver up to 5A per phase continuous output current. It features four buck controllers and has the capability to reconfigure its power stages to these controllers. This flexibility allows seamless design-in, in a wide range of applications where high output power and small solution size are needed.

ISL91211A and ISL91211B integrate low ON-resistance MOSFETs and programmable PWM frequency, allowing the use of very small external inductors and capacitors. They feature automatic Diode Emulation and Pulse Skipping modes under light-load conditions to further improve efficiency and maximize battery life. The ISL91211A and ISL91211B deliver a highly robust power solution by featuring a controller based on Intersil’s proprietary R5 Technology, it provides tight output accuracy and load regulation, ultra-fast transient response, seamless DCM/CCM transitions, and requires no external compensation.

In addition to the standard interrupt, chip enable, and watchdog reset functions, ISL91211A and ISL91211B also feature four MPIOs and two GPIOs capable of supporting SPI, I2 C communication protocol, and various other pin mode functions.

KEY FEATURES

  • ±0.7% system accuracy
  • 2.5V to 5.5V supply voltage
  • I2C and SPI programmable output from 0.3V to 1.2V (Output range of 2V can be supported with a different factory OTP)
  • 5A per phase output current capability
  • Factory configurable output
  • ISL91211A: 2 + 1 + 1 phase
  • ISL91211B: 1 + 1 +1 +1 phase
  • Independent Dynamic Voltage Scaling (DVS) for each output
  • Low IQ in Low Power mode
  • Automatic Diode Emulation mode for highest efficiency
  • Soft-start and fault detection (UV, OV, OC, OT)
  • Remote sense monitor
  • 2.551mmx3.670mm 54 ball WLCSP with 0.4mm pin pitch

PARAMETRICS

Parameters
ISL91211
Basic Information
Production Status
Mass Production
Topology
Buck
# of Outputs
4
Input Voltage Min (V)
2.5
Input Voltage Max (V)
5.5
Output Voltage Min (V)
0.3
Output Voltage Max (V)
1.2
Output Current Max (A)
10
IQ
1 µA
Switching Freq. (max) (MHz)
4
Switching Freq. (min) (MHz)
4
Qualification Level
Standard
Peak Efficiency (%)
90
POR
Yes
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
4 MHz
Temperature Range
-40 to +85

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