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PDF HA17805VP Data sheet ( Hoja de datos )
| Número de pieza | HA17805VP | |
| Descripción | 3-terminal Fixed Voltage Regulators | |
| Fabricantes | Hitachi Semiconductor | |
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HA17723/F/P
Precision Voltage Regulator
Description
The HA17723 high-accuracy general-purpose voltage regulator features a very low stand-by current,
(quiescent current) a low temperature drift, and high ripple rejection ratio. If you need over than 150mA
output current, adding external PNP or NPN transistor. This voltage regulator is suitable for various
applications, for example, series or parallel regulator, switching regulator.
Ordering Information
Type No.
HA17723
HA17723F
HA17723P
Application
Commercial use
Industrial use
Package
DP-14
FP-14DA
DP-14
Pin Arrangement
NC
CURRENT
LIMIT
CURRENT
SENSE
VIN (–)
VIN (+)
VREF
VEE
1 14
2 13
3 12
4 11
5 10
69
78
(Top View)
NC
COMP
VCC
VC
VOUT
VZ
NC
1 page  
HA17723/F/P
HA17723 Applications
Fixed Voltage Source in Series
Low Voltage (2 to 7 V) Regulator: Figure 1 shows the construction of a basic low voltage regulator. The
divider (resistors R1 and R2) from VREF makes the reference voltage, which will be provided to the
noninverted input of the error amplifier, less than output voltage. In the fixed voltage source where the
output voltage will be fed back to the error amplifier directly as shown in figure 1. Output voltage will be
divided VREF since the output voltage is equal to the reference voltage.
Thus, the output voltage VOUT is:
VOUT = nVREF,
n=
R2
R1 + R2
CREF
1µF
VIN
VCC
VC
VREF VOUT
R1
2.15kΩ
CL
RSC = 0
R2
4.99kΩ
CS
VIN(+) VIN(–)
R3 1.5kΩ
C1
VEE COMP 100pF
VOUT
Figure 1 Low Voltage (2 to 7 V) Regulator
High Voltage (7 to 37 V) Regulator: Figure 2 shows the construction of a regulator whose output voltage
is higher than the reference voltage, VREF. VREF is added to the non-inverted input of the error amplifier via
a resistor, R3. The feedback voltage is produced by dividing the output voltage with resistors R1 and R2.
Thus, the output voltage VOUT is:
VOUT =
VREF
n
,
n = R2
R1 + R2
R3
3.8kΩ
VIN
VCC
VREF
VIN(+)
VEE
VC
VOUT
CL
CS
VIN(–)
COMP
RSC = 0 VOUT
C1
100pF
R1
7.87kΩ
R2
7.15kΩ
Figure 2 High Voltage (7 to 37 V) Regulator
5
5 Page 
HA17723/F/P
Fixed Voltage Source with Reduction Type Current Limiter
VIN
VCC
VREF
VC
VOUT
R2
2.15kΩ
CL
CS
R1
5.0kΩ
VIN(+) VIN(–)
VEE COMP C1
1nF
RSC 30Ω
R3
2.7kΩ
R4
5.6kΩ
VOUT
Figure 12 Fixed Voltage Source with Reduction Type Current Limiter
6.0
5.0 VO
4.0
3.0
2.0
IOP
IOS =
R3 + R4
R4 ⋅ RSC
⋅ VBE
IOP = IOS +
R3
R4 ⋅ RSC
⋅ VO
1.0
0
0
IOS
100
Output Current IOUT (mA)
200
Figure 13 Current Control Characteristics of Fixed Voltage Source
with Reduction Type Current Limiter
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet HA17805VP.PDF ] | |
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