DATASHEET
ISL91302B
Dual/Single Output Power Management IC
FN8828
Rev.3.01
Feb 2, 2022
The ISL91302B is a highly efficient, dual or single
output, synchronous multiphase buck switching regulator
that can deliver up to 5A per phase continuous output
current. The ISL91302B features four integrated power
stages and two controllers. The ISL91302B can assign its
power stages and controllers to two dual-phase outputs
(2+2) or one three-phase and one-phase output (3+1) or
one four-phase output (4+0). This flexibility allows
seamless design-in for a wide range of applications in
which dual, triple, or quad phase outputs are needed,
such as CPU and GPU core power mobile applications.
Features
• Dual output 3+1 or 2+2, or single output 4-phase
• 2.5V to 5.5V supply voltage
• 5A per phase output current capability
• Small solution size
• High efficiency (94.7% peak for 3.8V V , 1.8V
IN
V
, L = 470nH)
OUT
• Low I in low power mode
Q
• Proprietary control scheme reduces the output
capacitor and supports fast load transients (such as
50A/μs per phase)
The ISL91302B integrated low ON-resistance
MOSFETs, programmable PWM frequency, and
automatic diode emulation, which maximizes efficiency
while minimizing the external component count and
solution size.
• Voltage, current, and temperature telemetry through
integrated ADC plus auxiliary inputs
• ±0.7% system accuracy with remote voltage sensing
The ISL91302B uses the proprietary Renesas R5
modulator technology to deliver a highly robust power
solution capable of ultra-fast transient response, excellent
loop stability, and seamless DCM/CCM transitions
without requiring external compensation.
• OTP programmable PWM frequency from 2MHz to
6MHz
2
• I C and SPI programmable output from 0.3V to 2.0V
• Independent Dynamic Voltage Scaling (DVS) for
each output
The ISL91302B is widely configurable through the
factory OTP settings. Available features include:
• Soft-start and fault detection (UV, OV, OC, OT),
short-circuit protection
2
• SPI and I C interface
• External signal telemetry with an internal ADC
• 2.551mmx 3.670mm 54 ball WLCSP with 0.4mm pin
pitch
• Dynamic Voltage Scaling (DVS) with selectable slew
rate
Applications
• Smart phones and tablets
Contact Renesas support for additional configurations.
• FPGA and ASIC power
• Industrial MPU power
• Human machine interface
100
95
90
85
80
75
Vout = 0.75
Vout = 1.0V
Vout = 1.5V
Vout = 1.8V
Test Conditions:
VIN = 3.8V
70
65
60
TA = +25°C
L = XEL3520-471MEB (470nH)
0.1
1
10
Load Current (A)
Figure 1. 2-Phase Configuration Efficiency
FN8828 Rev.3.01
Feb 2, 2022
Page 1 of 79
© 2017 Renesas Electronics
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