概述
数据手册AIC1594A-50CS 概述
1A STEP-DOWN PWM REGULATOR 1A降压型，PWM稳压器
AIC1594A-50CS 数据手册
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AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
DESCRIPTION
!
FEATURES
!
Operating Input Voltage From 4.5V to 36V
"
The AIC1594 series are step-down monolithic
PWM regulators delivering 1A at fixed voltages of
2.5V , 3.3V, 5.0V , 12V and using a external di-
vider to adjust output voltage from 1.25V to 30V
with excellent line and load regulation.
2.5V, 3.3V, 5V , 12V and Adjustable Output Ver-
sion
"
Adjustable Version Output Voltage Range , 1.25V
"
to 30V ± 4% max Over Line and Load Regulation
Available in TO220-5 and TO263-5 Package
Requires Only 4 External Components.
150KHz/300KHz Fixed Constant Frequency
Low Power Standby Mode, IQ Typically 80µA
TTL Shutdown Capability.
"
"
"
"
"
"
"
"
Switching frequency up to 150KHz/300KHz are
achievable thus allowing smaller sized filter com-
ponents. Internal current limit and thermal shut-
down circuits provide protection from overloads. It
also provides output overvoltage and short pro-
tection under fault conditions.
Output Overvoltage Protection
Current Limit and Thermal Shutdown Protection.
1A Guaranteed Output Current
The internal precious reference combined with
voltage feedback loop provides optimum output
voltage accuracy and fast load transient response.
APPLICATIONS
!
Simple High Efficiency Step-down regulator
"
Packages available are in standard SOT89-5
and DIP8 for standard assembly and TO263-5,
SOP8 for SMD.
On-Card Switching regulators
"
TYPICAL APPLICATION CIRCUIT
!
2
1
IN
OUT
V
L1
IN
+
V
OUT
+
C2
AIC1594
C3
C1
D1
ꢀ
4
FB
SHDN
R1
GND
3
R1 short and R2 open for fixed
switching output version
R2
1A Precision PWM DC/DC Regulator
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
1
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
ORDERING INFORMATION
ꢀ ꢀ
!
AIC1594X- XXCX
ORDER NUMBER
PIN CONFIGURATION
AIC1594A(B)CM
AIC1594A(B)-25CM
AIC1594A(B)-33CM
AIC1594A(B)-50CM
AIC1594A(B)-12CM
(TO263-5)
PACKAGE TYPE
M: TO263-5
N: DIP8
S: SO8
T: TO220-5
FRONT VIEW
1: IN
2. OUT
3. GND
1 2 3 4 5
4. FB
5. SHDN
OUTPUT VOLTAGE
DEFAULT: Adj.
25: 2.5V
AIC1594A(B)CN
AIC1594A(B)-25CN
AIC1594A(B)-33CN
AIC1594A(B)-50CN
AIC1594A(B)-12CN
(DIP8)
TOP VIEW
33: 3.3V
50: 5.0V
12: 12.0V
1
2
3
4
8
7
6
5
SHDN
IN
IN
FREQUENCY VERSION
A: 150KHZ
B: 300KHZ
FB
GND
GND
OUT
OUT
AIC1594A(B)CS
AIC1594A(B)-25CS
AIC1594A(B)-33CS
AIC1594A(B)-50CS
AIC1594A(B)-12CS
(SO8)
FRONT VIEW
1: IN
2. OUT
3. GND
4. FB
AIC1594A(B)CT
AIC1594A(B)-25CT
AIC1594A(B)-33CT
AIC1594A(B)-50CT
AIC1594A(B)-12CT
5.ꢀSHDN
1
2 3 4 5
(TO220-5
)
ABSOLUTE MAXIMUM RATINGS
!
!
Supply Voltage ……………..……………......……………............…………….................36V
FB, SHDN Pin Input Voltage ……………..……………......…………………….................25V
Operating Temperature Range …….…………...............…………….………....... 0°C ~ 70°C
Storage Temperature Range ……...................……..…….…………………. –65°C ~ 150°C
TEST CIRCUIT
Refer to Typical Application Circuit.
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
2
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
ELECTRICAL CHARACTERISTICS (T =25°C, V =18V)
!
J
IN
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX. UNIT
Input Voltage
4.5
36
V
V
Fixed Output Voltage
AIC1594-25 (V > 4.5V)
2.5
3.3
IN
AIC1594-33 (V > 4.5V)
V
IN
AIC1594-50 (V > 7.0V )
5.0
V
IN
AIC1594-12 (V > 15V )
12.0
1.25
V
IN
Feedback Voltage
AIC1594 Adjustable
V
Output Voltage Regulation
Quiescent Current
4
5
%
mA
µA
V
Internal switch off
1
Shutdown Quiescent Current
Logic Input High
SHDN = 5V (OFF)
(Regulator OFF)
(Regulator ON )
AIC1594A series
AIC1594B series
80
2
Logic Input Low
0.8
V
Oscillator Frequency
Oscillator Frequency
Output Current Limit
Over Voltage Protection
Maximum Duty Cycle
Efficiency
150
300
1.5
KHz
A
1.0
120
%
100
%
Vo=5V , Io=2A
90
%
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
3
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
PIN DESCRIPTIONS
!
TO-220-5, TO-263-5
PIN 1: IN
Supply voltage input for the IC
PIN 4: FB
Feedback input for fixed-output or
adjustable-output version. Connect di-
rectly to output for fixed operation
version or to a resistor divider for ad-
justable operation versions.
switching regulator. A suitable input
bypass capacitor must be present at
this pin to minimize voltage transients
and to supply the switching currents
needed by the regulator.
PIN 5: SHDN Allows the switching regulator circuit
to be shutdown using logic level sig-
nals thus dropping the total input sup-
ply current to approximately 80µA.
Drive it high to disable the reference ,
PIN 2:OUT
Internal switch. The voltage at this pin
switches between ( V -V
) and
IN SAT
approximately –0.5V, with a duty cycle
of approximately V /V .
OUT IN
PIN 3: GND Ground requires a short, low noise
connection to ensure good load
regulation.
control circuitry
,
and internal
switches .Drive low or connect to
GND for normal operation.
SO8, DIP8
PIN 1, 2: IN Supply voltage input for the IC switch-
ing regulator. A suitable input bypass
capacitor must be present at this pin to
minimize voltage transients and to
supply the switching currents needed
by the regulator.
PIN 7:
PIN 8:
FB Feedback input for fixed-output or ad-
justable-output version. Connect di-
rectly to output for fixed operation ver-
sion or to a resistor divider for adjusta-
ble operation versions.
SHDN Allows the switching regulator cir-
cuit to be shutdown using logic level
signals thus dropping the total input
supply current to approximately 80µA.
Drive it high to disable the reference ,
PIN 3, 4: OUT Internal switch. The voltage at this pin
switches between ( V -V
) and ap-
IN SAT
proximately –0.5V, with a duty cycle of
approximately V
/
.
OUT VIN
PIN 5, 6: GNDGround requires a short, low noise
connection to ensure good load regu-
lation.
control circuitry
,
and internal
switches .Drive low or connect to GND
for normal operation.
ANALOG INTEGRATIONS CORPORATION
www.analog.com.tw
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
TEL: (8863)577-2500 FAX:(8863)577-2510
4
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
BLOCK DIAGRAM
!
SHDN
IN
1.25 V
2.5V Regulator
ON / OFF
Reference
FB
Current
Limit
COMP.
AMP.
COMP.
Compensation
Circuit
Latch
Driver
OUT
GND
150/300
KHz OSC
Thermal
Shutdown
PHYSICAL DIMENSIONS
!
" 8 LEAD PLASTIC SO (unit: mm)
D
SYMBOL
MIN
1.35
0.10
0.33
0.19
4.80
3.80
MAX
A
A1
B
1.75
0.25
0.51
0.25
5.00
4.00
H
E
C
D
E
e
e
1.27(TYP)
A
H
L
5.80
0.40
6.20
1.27
C
B
L
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
5
AIC1594
1A STEP-DOWN PWM REGULATOR
SPEC NO: DS-1594-P1 03/23/00
" 8 LEAD PLASTIC DIP (unit: mm)
SYMBOL
MIN
0.381
2.92
0.35
0.20
9.01
7.62
6.09
MAX
—
D
A1
A2
b
4.96
0.56
0.36
10.16
8.26
7.12
E1
C
E
D
A2
E
A1
E1
e
C
L
2.54 (TYP)
eB
eB
L
—
10.92
3.81
e
b
2.92
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
6
AIC1594A-50CS 相关器件
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