AME, Inc.
AME5104
n
General Description
The AME5104 is a monolithic IC that was designed as a step-down DC/DC Converter and owns the ability of driving a
3A load without additional transistor component.The output versions included 3.3V,5V,12V and an adjustable type.It
operates at a switching frequency of 150KHz thus allowing smaller sized filter components otherwise it would need
lower frequency switchhing regulators.
Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load
conditions, and +15% on the oscillator frequency. Regarding protected function, current limit is to protect over current
operating of the output switch.
150KHz,3A PWM
DC/DC Buck Converter
n
Features
l
3.3V, 5V, 12V and adjustable
l
Adjustable version output voltage range:
1.4-36V
l
+4% max over line and load conditions
l
150KHz +15% fixed switching frequency
l
TTL shutdown capability
l
Operating voltage can be up to 36V
l
Output load current: 3A
l
TO-263-5L package
l
Low power standby mode
l
Current-limit protection
l
High efficiency
l
Built-in a switching transistor on chip,
requires only 4 external components
l
All AME's Lead Free Products Meet
Standards RoHS
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Applications
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Simple High-efficiency step-down regulator
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Positive to negative converter
l
On-card switching regulators
Rev.C.02
1
AME, Inc.
AME5104
n
Function Block Diagram
EN
V
IN
Current
Source
Bias
+
+
150KHz,3A PWM
DC/DC Buck Converter
1.235V
Reference
2.5V
Regulator
Start
Up
200 mV
220 mV
R
+
COMP
Current
Limit
-
-
+
FB
R2
+
COMP
-
AMP
-
+
COMP
+
Driver
Thermal
Limit
3A
Switch
R 1=2.5K
COMP
-
150 KHz
OSC.
SW
GND
n
Typical Application
4
+
1
Input
C1
680uF
3
FB
2
SW
EN
AME 5104
Fix Output
GND
5
L1
33uH
D1
1N5825
C2
220 uF
Unregulated
DC Input
L
O
A
D
R2
1K
+
1
Input
C1
680uF
4
FB
2
SW
R1
AME 5104
Adjustable Output
3
Gnd
5
L1
47uH
D1
1N5825
C2
220uF
Unregulated
DC Input
EN
L
O
A
D
2
Rev.C.02
AME, Inc.
AME5104
n
Pin Configuration
TO-263-5
Top View
AME5104ACDV
1. IN
2. SW
150KHz,3A PWM
DC/DC Buck Converter
A M E5104
3. GND(TAB)
4. FB
5. EN
1
2
3
4
5
n
Pin Description
AME5104AJDVxxx
Pin Number
1
Pin Name
IN
Pin Description
Analog and Power input. Input Supply Pin.
Place bypass capacitor as close to V
IN
as possible.
Power Switch input.
This is the drain of the internal NMOS power switch.
Minimize the metal trace area connected to this pin to minimize EMI.
2
SW
3
GND
Ground. Tie directly to ground plane.
Output voltage feedback input.
Set the output voltage by selecting values for R1 and R2 using:
3
FB
V
R
1
=
R
2
out
−
1
1 . 23
V
Connect the ground of the feedback network to a GND plane.
Enable, active low.
The enable pin is an active low control. Tie this pin above 2V to turn off the
device. Tie this pin below 0.6V to enable the device.
5
EN
Rev.C.02
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AME, Inc.
AME5104
n
Ordering Information
AME5104 x x x x xxx x
Special Feature
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
150KHz,3A PWM
DC/DC Buck Converter
Pin
Configuration
A
(TO-263)
Operating Ambient
Package Type
Temperature Range
C: 0
O
C to 70
O
C
D: TO-263
Number
of
Pins
V: 5
Output Voltage
Special Feature
1. IN
2. SW
3. GND
4. FB
5. EN
330:
500:
12A:
ADJ:
3.3V
5V
12V
Adjustable
Z:
Lead free
4
Rev.C.02
AME, Inc.
AME5104
n
Ordering Information
Part Number
AME5104ACDV330Z
150KHz,3A PWM
DC/DC Buck Converter
Marking*
AME5104
ACDV330
yyww
AME5104
ACDV500
yyww
AME5104
ACDV12A
yyww
AME5104
ACDVADJ
yyww
Output
Voltage
3.3V
Package
TO-263-5
Operating Ambient
Temperature Range
0
O
C to 70
O
C
AME5104ACDV500Z
5V
TO-263-5
0
O
C to 70
O
C
AME5104ACDV12AZ
12V
TO-263-5
0
O
C to 70
O
C
AME5104ACDVADJZ
ADJ
TO-263-5
0
O
C to 70
O
C
Note: ww represents the date code.
* A line on top of the first letter represents lead free plating such as A5104 ACDV330 yyww.
Please consult AME sales office or authorized Rep./Distributor for the availability of package type.
Rev.C.02
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