FN8922 Rev.1.00 Page 1 of 2
May 8, 2017
FN8922
Rev.1.00
May 8, 2017
ISL91211A, ISL91211B
Triple/Quad Output Power Management IC
DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl91211
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,
I
2
C communication protocol, and various other pin mode
functions.
Features
• ±0.7% system accuracy
• 2.5V to 5.5V supply voltage
•I
2
C 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 I
Q
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
Applications
•Smart phones
•Tablet PCs
• Peripheral notebook power
•FPGA
•SSD
•Infotainment
Related Literature
• Visit our website product page for ISL91211
• UG109, “ISL91211x SPI Dongle GUI User Guide”
• UG111, “ISL91211AII-EVKIT1Z Evaluation Kit User Guide”
• UG116, “ISL91211BII-EVKIT1Z Evaluation Kit User Guide”
FIGURE 1A. DUAL PHASE FIGURE 1B. SINGLE PHASE
FIGURE 1. EFFICIENCY vs LOAD
70
75
80
85
90
95
0.01 0.1 1 10
LOAD (A)
Vout = 1.1V Vout = 0.95V
Vout = 0.85V Vout = 0.75V
TEST CONDITIONS:
V
IN
= 3.8V, f
SW
= 4MHz
T
= +25
o
C, L = 220nH (Cyntec)
70
75
80
85
90
95
0.01 0.1 1 10
LOAD (A)
Vout = 1.1V Vout = 0.95V
Vout = 0.85V Vout = 0.75V
TEST CONDITIONS:
V
IN
= 3.8V, f
SW
= 4MHz
T
= +25
o
C, L = 220nH (Cyntec)
