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LX7165-03CSP

Description
IC REG BUCK PROG 5A SYNC 20WLCSP
Categorysemiconductor    Power management   
File Size1MB,24 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Environmental Compliance
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LX7165-03CSP Overview

IC REG BUCK PROG 5A SYNC 20WLCSP

LX7165-03CSP Parametric

Parameter NameAttribute value
Functionstep down
Output configurationjust
Topologystep down
Output typeProgrammable (fixed)
Number of outputs1
Voltage - Input (minimum)3V
Voltage - input (maximum)5.5V
Voltage - Output (minimum/fixed)0.6V(0.97V)
Voltage - Output (maximum)3.3V
Current - Output5A
Frequency - Switch1.875MHz
Synchronous rectifieryes
Operating temperature0°C ~ 85°C(TA)
Installation typesurface mount
Package/casing20-UFBGA,WLCSP
Supplier device packaging20-WLCSP
LX7165
3V to 5.5V, 5A Constant Frequency Hysteretic 
Synchronous Buck Regulator with I
2
Production Datasheet
 
 
The LX7165 is a digitally controlled step‐down regulator 
IC with an integrated 40mΩ high‐side P‐channel 
MOSFET and a 14mΩ low‐side N‐channel MOSFET.  It 
features Microsemi’s proprietary constant‐frequency 
hysteretic control engine for near‐instantaneous 
correction to line/load transients.  It does not require 
high‐ESR output capacitors and incorporates energy‐
saving “PSM” (Power Save or Pulse Skip Mode) at light 
loads, to extend battery life in mobile applications. 
The LX7165 has an I C serial interface port for output 
voltage margining and monitoring if required (it can 
also operate in default mode).  In addition it includes 
robust fault monitoring functions.  
The LX7165 will operate from 3V to 5.5V, and is  readily 
available in 4 fixed output voltage options: 0.8, 0.9V, 
0.95V, and 0.97V (no voltage divider is necessary).  After 
start up, the reference voltage can be adjusted with I2C 
with a resolution 4.7mV between 0.6V and  1.2V. The 
output voltage can also be adjusted with an external 
voltage divider up to 3.3V. 
 
2
Description 
Features 
 
Constant Frequency Hysteretic Control 
Extremely Fast Line/Load Transient Response 
I
2
C for Output Adjustment (3.4Mbps) 
1.875 MHz Switching Frequency 
Extremely Low‐R
DSON
 MOSFETS  
Input Voltage Rail 3.3V to 5V 
Greater than 5A Output Current  
I
2
C Selectable Power Save Mode for Light‐Load 
Efficiency  
UVLO, OVP, OCP  
0°C to +85°C Ambient Temperature 
Available in WLCSP‐20 (0.4mm pitch)  
RoHS Compliant 
 
Applications 
High Performance HDD  
Notebooks/Netbooks/Tablets/Slates  
Figure 1:
Typical 5V to 1.8V at 5A schematic with or without I
2
C implemented
Microsemi
Analog Mixed Signal Group
One Enterprise Aliso Viejo, CA 92656 USA, 1-800-713-4113, 949-380-6100, fax 949-215-4996
Copyright © 2016
Rev. 1.2, 09/192016
Page 1

LX7165-03CSP Related Products

LX7165-03CSP LX7165-02CSP
Description IC REG BUCK PROG 5A SYNC 20WLCSP IC REG BUCK PROG 5A SYNC 20WLCSP
Function step down step down
Output configuration just just
Topology step down step down
Output type Programmable (fixed) Programmable (fixed)
Number of outputs 1 1
Voltage - Input (minimum) 3V 3V
Voltage - input (maximum) 5.5V 5.5V
Voltage - Output (minimum/fixed) 0.6V(0.97V) 0.6V(0.95V)
Voltage - Output (maximum) 3.3V 3.3V
Current - Output 5A 5A
Frequency - Switch 1.875MHz 1.875MHz
Synchronous rectifier yes yes
Operating temperature 0°C ~ 85°C(TA) 0°C ~ 85°C(TA)
Installation type surface mount surface mount
Package/casing 20-UFBGA,WLCSP 20-UFBGA,WLCSP
Supplier device packaging 20-WLCSP 20-WLCSP
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