HT1087 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT1087 Datasheet PDF : 13 Pages
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HT1087 Series
Electrical Characteristics
TJ=25°C, VIN=VOUT+1.5V, IO=10mA, unless otherwise specified (see note 1)
Symbol
VREF
VOUT
DVLOAD
DVLINE
VDIF
ILIMIT
IADJ
ISS
RR
D V OUT
DTa
Parameter
Reference Voltage
Output Voltage
Load Regulation (see note 2)
Line Regulation
Dropout Voltage (see note 3)
Current Limit (see note 4)
Adjust Pin Current
(Variable Version)
Quiescent Current
(Fixed Version)
Ripple Rejection
Temperature Coefficient
Test Conditions
2.75V £ VIN £ 12V
HT1087-15
HT1087-18
HT1087-25
HT1087-33
HT1087-50
IOUT=0.5A
2.75V £ VIN £ 12V
DVOUT=2%, IOUT=0.5A
DVOUT=10%
2.75V £ VIN £ 12V
2.75V £ VIN £ 12V
120Hz input ripple
COUT=22mF
-40°C<Ta<85°C
Min.
1.225
1.470
1.764
2.450
3.234
4.900
1
¾
¾
0.5
¾
¾
¾
¾
Typ.
1.250
1.500
1.800
2.500
3.300
5.000
¾
0.015
1.1
1.5
55
8
60
±0.4
Max.
Unit
1.275
V
1.530
V
1.836
V
2.550
V
3.366
V
5.100
V
20
mV
0.15
%/V
1.3
V
¾
A
120
mA
13
mA
¾
dB
¾
mV/°C
Note:
1. Specifications are production tested at room temperature, Ta. Specifications within the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
2. Load regulation is measured at a constant junction temperature, using pulse testing with a low ON time and
is guaranteed up to the maximum power dissipation. Power dissipation is determined by the input/output
differential voltage and the output current. Guaranteed maximum power dissipation will not be available over
the full input/output range. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) - Ta) / qJA.
3. Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the
output voltage from the value at VIN = VOUT+1.5V with a fixed load.
4. Current limit is measured by pulsing for a short time.
Rev. 1.10
3
October 5, 2007
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