AIC2510
3A STEP-DOWN PWM CONVERTER
FEATURES
Operating Input Voltage From 4.5V to 30V
3.3V, 5V, 12V and Adjustable Output Version
Adjustable Version Output Voltage Range,
1.2V to 30V
±
4% max Over Line and Load
Regulation
Available in TO-263-5, TO-220-5 and TO-220B
Package
Requires Only 4 External Components
150KHz Fixed Constant Frequency
Low Power Standby Mode, I
Q
Typically 80µA
TTL Shutdown Capability
Current Limit
Protection
and
Thermal
Shutdown
GENERAL DESCRIPTION
The AIC2510 series are step-down monolithic
PWM converters for delivering 3A at fixed
voltages of 3.3V, 5.0V, 12V and using an
external divider to adjust output voltage from
1.2V to 30V with excellent line and load
regulation.
Switching frequency up to 150KHz is achievable
thus allowing smaller-sized filter components.
Internal current limit and thermal shutdown
circuits provide protection from overloads. The
internal
voltage
precise
accuracy
reference
and
fast
combined
load
with
voltage feedback loop provides optimum output
transient
response.
3A Guaranteed Output Load Current
APPLICATIONS
Fixed Voltage power supply for LCD Monitor
and LCD TV
On-Card Switching regulators
Simple High Efficiency Step-down regulator
TYPICAL APPLICATION CIRCUIT
V
IN
AIC2510
1
+
IN
OUT
2
L1
+
C2
R1
V
OUT
C1
C1: electrolyte capacitor 470uF
C2: electrolyte capacitor 220uF
CF:refer to table1
D1: SK54
L1:33uH
Analog Integrations Corporation
FFO/NO
GND
3
5
4
FB
D1
CF
R2
R1 short, R2 and CF open for fixed version
3A1, No.1 Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510 www.analog.com.tw
DS-2510G-01 092408
1
AIC2510
ORDERING INFORMATION
AIC2510- XXXXXXX
PACKING TYPE
TR: TAPE & REEL
TB: TUBE
ORDER NUMBER
AIC
2510PM5
AIC
2510-33PM5
AIC
2510-50PM5
AIC
2510-12PM5
PIN CONFIGURATION
TO-263-5
FRONT VIEW
1: IN
2. OUT
3. GND
4. FB
5. ON/OFF
TO-220-5
FRONT VIEW
1: IN
2. OUT
3. GND
4. FB
5. ON/OFF
12 3 4 5
PACKAGE TYPE
M5 : TO-263-5
T5 : TO-220-5
B5 : TO-220B
P: Lead Free Commercial
G: Green Package
OUTPUT VOLTAGE
DEFAULT : Adj
33 : 3.3V
50 : 5.0V
12 : 12.0V
AIC
2510PT5
AIC
2510-33PT5
AIC
2510-50PT5
AIC
2510-12PT5
1 2 3 4 5
AIC
2510PB5
AIC
2510-33PB5
AIC
2510-50PB5
AIC
2510-12PB5
TO-220B
FRONT VIEW
1: IN
2. OUT
3. GND
4. FB
5. ON/OFF
1 2 3 4 5
Example: AIC2510-50PM5TR
5.0V Output Version, in Lead Free TO-263-
5 Package
& Taping & Reel Packing Type
AIC2510-33PB5TR
3.3V Output Version, in Lead Free TO-220B Package
& Taping & Reel Packing Type
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
FB, ON/OFF Pin Input Voltage
Operating Temperature Range
Storage Temperature Range
Junction Temperature
Lead Temperature (Soldering 10sec.)
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
(Assume no ambient airflow, no heatsink)
TO-263-5, TO-220-5, TO-220B
TO-263-5
TO-220-5, TO-220B
30V
-0.3V to 30V
-40°C ~ 85°C
-65°C ~ 150°C
125°C
260°C
3°C/W
60°C/W
50°C/W
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
2
AIC2510
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Voltage
Fixed Output Voltage
AIC2510-33 (V
IN
> 4.75V)
AIC2510-50 (V
IN
> 7.0V)
AIC2510-12 (V
IN
> 15V)
FB Reference Voltage
Saturation Voltage
Output Voltage Regulation
Quiescent Current
Shutdown Quiescent Current
FB bias current
Output leakage current
Logic Input High
Logic Input Low
Oscillator Frequency
Output Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Efficiency
Vo=5V, Io=3A
Internal switch off
ON/OFF= 5V (OFF)
V
FB
=1.3
Vout=-0.9
(Regulator OFF)
(Regulator ON)
130
3.6
100
0
80
150
2.0
0.6
180
5.5
5
80
10
2
(T
A
=25°C, V
IN
=12V for the 3.3V, 5V and
°
Adjustable version and V
IN
=24V for the 12V version.) (Note1)
TEST CONDITIONS
MIN.
4.5
3.168
4.800
11.52
TYP.
MAX.
30
3.432
5.200
12.48
1.267
UNIT
V
V
V
V
V
V
%
mA
µA
nA
mA
V
V
KHz
A
%
%
%
1.193
1.2
1.4
4
10
200
50
30
Note 1:
Specifications are production tested at T
A
=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
3
AIC2510
TYPICAL PERFORMANCE CHARACTERISTICS
85
80
75
70
65
90
85
VOUT=3.3V version
80
75
70
VOUT=5.0V version
Efficiency (%)
55
50
45
40
35
30
25
20
10
100
1000
Efficiency (%)
60
65
60
55
50
45
40
35
Vin=5V
Vin=12V
Vin=18V
Vin=24V
Vin=12V
Vin=18V
Vin=24V
Vin=30V
10
100
1000
30
25
Load current (mA)
Load current (mA)
Fig.1 3.3V version efficiency
95
90
85
80
Fig.2 5V version efficiency
90
85
VOUT=12.0V version
80
Case Tempearature ( C)
75
70
65
60
55
50
45
40
35
30
25
5
10
15
20
Vout=12V
Vout=5.0V
Vout=3.3V
Efficiency (%)
75
70
65
60
55
50
45
10
100
1000
Vin=18V
Vin=24V
Vin=30V
o
I
OUT
=3A
TO-263-5
25
30
Load current (mA)
Input Voltage (V)
Fig.3 12V version efficiency
200
190
Fig.4 Case temperature vs. input voltage
6.8
6.4
6.0
Switching Frequency (kHz)
180
Current Limit (A)
170
160
150
140
130
120
110
100
-60
-40
-20
0
20
o
5.6
5.2
4.8
4.4
4.0
3.6
3.2
40
60
80
100
2.8
-60
-40
-20
0
20
40
60
80
100
T
J
( C)
Fig.5 Switching frequency vs. Temperature
Current Limit vs. Temperature
Fig.6 Current Limit vs. Temperature
4
AIC2510
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
1.6
1.5
1.4
1.6
1.5
1.4
Dropout Voltage (vlot)
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
-60
-40
-20
0
20
40
60
80
100
120
140
Saturation Voltage (volt)
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-40 C
25 C
100 C
o
o
o
3A
1A
TJ ( C)
o
Switch Current (A)
Fig.7 Dropout voltage vs. Temperature
2.5
Fig.8 Switching saturation voltage vs. switch current
5.0
4.8
ON/OFF threshold voltage (volt)
Minimum Supply Voltage (volt)
2.0
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
V
FB
=1.23V
I
LOAD
=120mA
OFF
1.5
1.0
ON
0.5
0.0
-60
-40
-20
0
20
40
60
80
100
120
140
2.8
-60
-40
-20
0
20
40
60
80
100
120
140
TJ ( C)
o
TJ ( C)
o
Fig.9 ON/OFF threshold voltage vs. Temperature
5.0
4.5
4.0
3.5
Fig.10 Minimum Operating supply voltage vs. Temperature
(ADJ only)
VIN = 30V
o
o
-40 C < TJ < 125 C
3A
I
OUT
0.1A
Current (uA)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
5
10
15
20
25
VOUT
100mV/div
VIN=12V
VOUT=5V
ON/OFF Pin Voltage (Volt)
Fig.11
ON / OFF
Pin Current (sinking) vs. Temperature
Fig.12 Load transient response
5
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