AME5125 Datasheet, PDF (1/11 Pages) Analog Microelectronics – High Efficiency 500KHz

AME
AME5125
n General Description
The AME5125 is a high-performance current mode syn-
chronous boost converter with integrated Power MOSFETs
which on-resistance of internal main switch is only 50mΩ
and rectifier switch resistance is 50mΩ to maintain high
efficiency in heavy load conditions that supports switch
peak current of up to 5.5A. The integrated circuit sup-
ports an input voltage range of 2.7V to 5.5V.
The converter can be disabled to minimize battery drain.
During shutdown, the load (V_OUT) is completely discon-
nected from the battery (V_IN). Additional functions in-
clude an internal soft-start function in order to easy in-
rush current control. The circuit protection includes Over
Voltage Protection and Thermal Shutdown to prevent de-
vice failure under the "Worst" of operating conditions.
This device is available in SOP-8/PP with exposed pad
for low thermal resistance.
n Applications
l Battery Bank
l Portable Devices
n Typical Application
Input
L1
2.2uH
C1
10uF
ON
OFF
SW
VOUT
VIN
FB
AME5125
ISET
EN
AGND
PGND
C4
5V
NC
R1
806K
C2
22uF
C3
22uF
R2
110K
RISET
110K
High Efficiency 500KHz
Step-Up Converter
n Features
l High Efficiency Synchronous Boost Con-
verter
l Internal Low R_DS(ON) Power MOSFETs
H: 50mΩ(PMOS) / L: 50mΩ(NMOS) Typical
l Operating (Input) Range: 2.7V ~ 5.5V
l Up to 5.5V Output Voltage
l 500KHz Switching Frequency
l Provide High Efficiency at Light Loading
l Load Disconnect During Shutdown
l Adjust Peak Switch Current
l Short Circuit into Hiccup Mode
l Internal Soft Start
l Integrated Over-Voltage Protection
l Thermal Shutdown
l All AME's Lead Free Products Meet RoHS
Standards
n Function Diagram
EN
SW
Oscillator
VIN
VOUT
Control
Logic
Well Switch
VOUT
Current
SENSE
PGND
Device
EN ^Control
ISET
OCP
PWM
EA
Loop
Compensation
VREF
FB
AGND
Rev.P01
1