PANASONIC AN6531

Voltage Regulators
AN6531
4-pin variable positive output voltage regulator
■ Overview
Unit : mm
The AN6531 is a monolithic 4-pin variable positive
output voltage regulator. With an external resistor, it provides any stabilized output voltages between 5V and 30V,
and is optimum for the power circuits with a current capacity of up to 0.5A. This IC incorporates various protection circuits.
9.6+0.5
–0.1
2.0
12.5 max.
4.0
φ3.1
■ Features
9.0 min.
3–1.0
1.8
• Wide range of output voltages: VO = 5 to 30V
• Built-in thermal overload protection circuit
• Built-in overcurrent protection circuit
• Built-in ASO (area of safe operation) protection circuit
0.7±0.2
0.5±0.1
1.5
1.3
3.3 max.
2.3 2.3 2.3
SSIP004-P-0000
■ Block Diagram
RSC
Output
Pass Tr
Short Circuit
Protection
1
2
Ref.
Voltage
+
Error
Amp.
−
Thermal
Protection
3
Control Common Input
Start Circuit
Current
Source
4
Output
1
AN6531
Voltage Regulators
■ Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Rating
VCC
ICC *
40
1.5
A
Power dissipation
PD
7.5
W
Operating ambient temperature
Topr
−20 to +75
°C
Storage temperature
Tstg
−55 to +150
°C
Supply voltage
Supply current
*
Unit
V
The internal circuit is provided with a current limiting circuit.
■ Electrical Characteristics at Ta = 25°C
Parameter
Output voltage tolerance
Line regulation
Load regulation
Symbol
VO
REGIN
REGL
Conditions
VI = VO+3V to VO+15V,
IO = 5 to 350mA, Tj = 25°C
VO = 5V, IO = 200mA,
VI = 7.5 to 25V, Tj = 25°C
VO = 18V, IO = 5mA,
VI = 21 to 33V, Tj = 25°C
VO = 18V, IO = 200mA,
VI = 21 to 25V, Tj = 25°C
VO = 5V, VI = 12V,
IO = 5 to 500mA, Tj = 25°C
Min
Typ
Max
Unit
4
%
1
%
0.75
%
0.67
%
1
%
Bias current
IBias
Tj = 25°C
3
5
mA
Control pin current
Icont
Tj = 25°C
1
8
µA
Ripple rejection ratio
RR
VI = 8 to 18V, VO = 5V, f = 120Hz
Output noise voltage
Vno
VO = 5V, f = 10Hz to 100kHz
Minimum input/output voltage difference
VDIF(min)
Output short-circuit current
IOS
Peak output current
IOP
Output voltage temperature coefficient
Control pin voltage
∆VO/Ta
Vcont
62
IO = 500mA, Tj = 25°C
VO = 5V, Tj = 25°C
Tj = −55 to +25°C
IO = 5mA
Tj = 25 to 150°C
Tj = 25°C
dB
µV
2
VI = 35V, VO = 5V, Tj = 25°C
VO = 5V
80
40
0.4
V
50
600
mA
1
1.4
A
0.5
mV/°C
− 0.5
4.8
5
5.2
V
Note 1) The specified condition Tj = 25°C means that the test should be carried out within so short a test time (within 10ms) that the
characteristic value drift due to the chip junction temperature rise can be ignored.
Note 2) Unless otherwise specified, VI = 10V, VO = 5V, IO = 350mA, CI = 0.33µF, CO = 0.1µF
2
Voltage Regulators
AN6531
Peak output current IOP (A)
1.2
(1)
6
(2)
4
(3)
2
0
20
40
60
Tj = 0°C
0.6
125°C
0.4
0
80 100 120 140 160
25°C
0
4
8
12
16
20
24
28
32
Input/output voltage difference VDIF (V)
RR  f
Transient response to input variation
VI = 8 to 18V
VO = 5V
IO = 20mA
15
Output voltage fluctuation (mV)
100
80
60
40
20
0
10
100
1k
10k
100k
1M
10
5
10
0
−10
−20
0
2
4
Frequency f (Hz)
8
10
2.4
2.0
IO = 500mA
200mA
1.6
100mA
1.2
10mA
0mA
0.8
0.4
−80 −40
0
40
80 120 160 200 240
Junction temperature Tj (°C)
Transient response to load variation
1.0
0.5
0
0.5
0
−0.5
−1.0
0
20
40
60
80
100
Time t (µs)
ZO  f
Current limiting characteristic
104
6
4
Output impedance ZO (mΩ)
5
Output voltage VO (V)
6
Time t (µs)
Input voltage VI (V)
Ambient temperature Ta (°C)
120
Ripple rejection ratio RR (dB)
0.8
0.2
(4)
0
1.0
VDIF(min)  Tj
2.8
Load current IL (A)
(1) TC = Ta
(2) With a 10°C/W heat sink
(3) With a 20°C/W heat sink
(4) Without heat sink
8
Power dissipation PD (W)
IO(peak)  VDIF
1.4
Output voltage fluctuation (V)
PD  Ta
10
Minimum input/output voltage difference VDIF(min) (V)
■ Main Characteristics
VI = 10V
VO = 5V
Tj = 25°C
3
2
1
VI = 10V
VO = 5V
IO = 20mA
CO = 0.1µF
Ta = 25°C
103
102
10
0
0
0.2
0.4
0.6
0.8
1.0
Output current IO (A)
1.2
10
100
1k
10k
100k
1M
Frequency f (Hz)
3
AN6531
Voltage Regulators
■ Basic Regulator Circuit
3
+V1
4
Input Output
AN6531
CI
0.33µF
+VO
1
Cont
Common
2
Vcont
R1
R1 + R 2
R1
(Vcont ≅ 5V, R1 = 5kΩ)
CI is necessary when the VI line is long.
CO improves the transient response.
VO = Vcont
R2
CO
0.1µF
■ Application Circuit Examples
1. Current bootstrap circuit
2. Current bootstrap circuit
(with current limiting circuit)
Q1
VI
Ie1
RSC
VI
Q1
Ie2
R3
6Ω
3
Input
IR
IP
AN6531
0.33µF
Cont
Common
2
R3 =
IO
Output 4
VBE(Q1) · β
(β + 1) IP − IO
6Ω
VO
0.1µF
5kΩ
3
IP
Input Output
AN6531
Cont
0.33µF
R1
RSC =
R3 =
Common
2
VBE(Q2)
Ie1(max)
VBE(Q1) + Ie1RSC
IO − Ie1
Ie2(max) = IP(max) −
4
Q2
IR
R2
1
R3
VBE(Q1) + VBE(Q2)
R3
IO
4
VO
R2
1
0.1µF
5kΩ
R1
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2001 MAR