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Buck Converter. AME5107 Datasheet

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Buck Converter. AME5107 Datasheet
















AME5107 Converter. Datasheet pdf. Equivalent













Part

AME5107

Description

PWM Control 3A Buck Converter



Feature


AME, Inc. AME5107 n General Description AME5107provides low-ripple power, high efficiency, and excellent transient cha racteristics. The PWM control circuit i s able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier cirwww.Data Sheet4U.com cuit as well as a soft-star t circuit that prevents overshoot at st artup. An enable f.
Manufacture

Analog Microelectronics

Datasheet
Download AME5107 Datasheet


Analog Microelectronics AME5107

AME5107; unction, an over current protect functio n and a short circuit protect function are built inside, and when OCP or SCP h appens, the operation frequency will be reduced from 350KHz to 30KHz. Also, an internal compensation block is built i n to minimum external component count. With the addition of an internal P-chan nel Power MOS, a coil, capacitors, and a diode connected .


Analog Microelectronics AME5107

externally, these ICs can function as st ep-down switching regulators. They serv e as ideal power supply units for porta ble devices when coupled with the SOP-8 L mini-package, providing such outstand ing features as low current consumption . Since this converter can accommodate an input voltage up to 18V, it is also suitable for the operation via an AC ad apter. PWM Contro.


Analog Microelectronics AME5107

l 3A Buck Converter n Applications l PC Motherboard l LCD Monitor l Graphic Car d l DVD-Video Player l Telecom Equipmen t l ADSL Modem l Printer and other Peri pheral Equipment l Microprocessor core supply l Networking power supply n Fea tures l Input voltage: 3.6V to 18V. l O utput voltage: 0.8V to VCC. l Duty rati o: 0% to 100% PWM control l Oscillation frequency: 350KHz.





Part

AME5107

Description

PWM Control 3A Buck Converter



Feature


AME, Inc. AME5107 n General Description AME5107provides low-ripple power, high efficiency, and excellent transient cha racteristics. The PWM control circuit i s able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier cirwww.Data Sheet4U.com cuit as well as a soft-star t circuit that prevents overshoot at st artup. An enable f.
Manufacture

Analog Microelectronics

Datasheet
Download AME5107 Datasheet




 AME5107
AME, Inc.
AME5107
PWM Control 3A Buck
Converter
n General Description
AME5107provides low-ripple power, high efficiency, and
excellent transient characteristics. The PWM control cir-
cuit is able to vary the duty ratio linearly from 0 up to
www.DataS1h0e0et%4U..cTohmis converter also contains an error amplifier cir-
cuit as well as a soft-start circuit that prevents overshoot
at startup. An enable function, an over current protect func-
tion and a short circuit protect function are built inside,
and when OCP or SCP happens, the operation frequency
will be reduced from 350KHz to 30KHz. Also, an internal
compensation block is built in to minimum external com-
ponent count.
With the addition of an internal P-channel Power MOS,
a coil, capacitors, and a diode connected externally, these
ICs can function as step-down switching regulators. They
serve as ideal power supply units for portable devices when
coupled with the SOP-8L mini-package, providing such
outstanding features as low current consumption. Since
this converter can accommodate an input voltage up to
18V, it is also suitable for the operation via an AC adapter.
n Applications
l PC Motherboard
l LCD Monitor
l Graphic Card
l DVD-Video Player
l Telecom Equipment
l ADSL Modem
l Printer and other Peripheral Equipment
l Microprocessor core supply
l Networking power supply
n Features
l Input voltage: 3.6V to 18V.
l Output voltage: 0.8V to VCC.
l Duty ratio: 0% to 100% PWM control
l Oscillation frequency: 350KHz typ.
l Soft-start, Current limit, Enable function
l Thermal Shutdown function
l Built-in internal SW P-channel MOS
l SOP-8 Package
l All AMEs Lead Free Products Meet RoHS
Standards
C
S
Rev.A.01
1




 AME5107
AME, Inc.
AME5107
n Typical Application
www.DataSheet4U.com
PWM Control 3A Buck
Converter
VOUT
L1 Value
Note: VOUT = VFB x (1+RA/RB)
RB=0.7K~ 5K
VIN=12V,IMAX=3A
2.5V
3.3V
22uH
27uH
5V
33uH
n Function Block Diagram
SW
IN
Thermal
Shutdown
Oscillation
Circuit
Reference Voltage
Source with Soft Start
PWM-Switched
Control Circuit
+
-
VEN 100µA
EN OCSET
FB
GND
2 Rev.A.01




 AME5107
AME, Inc.
AME5107
n Pin Configuration
SOP-8
Top View
8 7 65
www.DataSheet4U.com
AME5107
1 234
AME5107
1. FB
2. EN
3. OCSET
4. IN
5. SW
6. SW
7. GND
8. GND
* Die Attach:
Conductive Epoxy
PWM Control 3A Buck
Converter
n Pin Description
Pin Number
1
2
3
4
5,6
7,8
Rev.A.01
Pin Name
FB
EN
OCSET
IN
SW
GND
Pin Description
Output voltage Feedback input.
Set the outputCvoltage by selecting values for Ra and Rb using:
VOUT
=
0.8V 
Ra + Rb
Rb

Connect the ground of the feedback network to an AGND (Analog
Ground) plane which should be tied directly to the GND pin.
Enable Control Input, active high.
The enable pin is an active high control. Tie this pin above 2V to enable
the device. Tie this pin below 0.8V to shut down the device. In shutdown,
all function are disabled. Do not leave EN pin floating.
Add an external resistor to set max output current.
Input Supply Voltage Pin.
Bypass this pin with a capacitor. The capacitor shall be placed as close
to the device as possible.
Switch Node Connection to Inductor.
Ground.
Tie directly to ground plane.
3




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