RT5800
2.1MHz, 3 CHs, Step-Down Converter with I
2
C Interface
General Description
The RT5800 is a multi-phase, programmable power
management IC, integrated with four high efficient,
synchronous step-down converter cores. The RT5800
can be 2 + 2 and 2 + 1 + 1 output by OTP. It also
features wide output voltage range and the capability to
configure the corresponding power stages, which make
the device optimized to meet power management
requirements for low-power processors, such as core
power for CPUs and GPUs. The RT5800 supports
many programmable functions including voltage level,
slew rate of voltage change, and slew rate of soft-start
via an I
2
C interface capable of operating up to 3.4MHz.
The RT5800 also supports remote-sense function to
get accurate output voltage at large loading. Moreover,
the device has interrupt and fault-detection function to
report error status. The RT5800 is available in a
WQFN-30L 4.5x5 (FC) package.
Features
FMEA Compliant PinOut
2 + 2 / 2 + 1 + 1 Phase Output
Input Supply Voltage Range : 3V to 6V
I
2
C Programmable Output Voltage : 0.3V to 1.85V
Maximum Output Current : 5.5A per Phase
Output Remote Sense for High Accuracy
Fast Transient Response
Selectable Automatic Phase Shielding and
Power Saving Mode Enables Higher Light Load
Efficiency
Dynamic
Voltage
Scaling
(DVS)
Programmable Slew Rate for Each Output
Programmable Soft-Start Function
Interrupt Function and Fault Detection
Watchdog Function
Input Under-Voltage Lockout (UVLO)
Cycle-by-Cycle Current Limit
Output Under-Voltage Protection
Over-Temperature Protection
WQFN-30L 4.5x5 (FC)
with
Applications
Automotive Systems
Simplified Application Circuit
AVIN
V
IN
PVIN1
C
IN
PVIN2
PVIN3
PVIN4
EN
I C Signal
2
VOUT1
LX1
LX4
RTN1
VOUT2
RT5800
LX2
RTN2
VOUT3
LX3
RTN3
PGND
AGND
L3
V
OUT3
C
OUT3
L2
V
OUT2
C
OUT2
L1
L4
V
OUT1
C
OUT1
SCL
SDA
VSELA
Signal Input
Signal Output
WDOG_RST
INT
VIO
AVIN_FILT
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS5800-00
November 2019
www.richtek.com
1
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