HA17723 データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

コンポーネント説明

メーカー

HA17723

Precision Voltage Regulator

Hitachi -> Renesas Electronics 

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

Share Link: