HT1117 Series
Electrical Characteristics
TJ=25°C, VIN=VOUT+1.5V, IO=10mA, unless otherwise specified (see note 1)
Symbol
Parameter
Test Conditions
2.75V £ VIN £ 12V
HT1117-18
Min.
1.225
1.764
2.45
2.793
3.234
4.90
1
Typ.
1.250
1.800
2.50
2.850
3.300
5.00
¾
Max.
1.275
1.836
2.55
2.907
3.366
5.10
30
Unit
V
VREF
Reference Voltage
V
HT1117-25
V
VOUT
Output Voltage
HT1117-28
V
HT1117-33
V
HT1117-50
V
Load Regulation (see note 2)
Line Regulation
mV
%/V
V
DVLOAD
DVLINE
VDIF
10mA £ IOUT £ 1A
2.75V £ VIN £ 12V
DVOUT=2%, IOUT=1A
DVOUT=10%
0.015
1.1
0.150
1.3
¾
¾
1
Dropout Voltage (see note 3)
Current Limit (see note 4)
ILIMIT
2.3
A
¾
Adjust Pin Current
(Variable Version)
IADJ
2.75V £ VIN £ 12V
2.75V £ VIN £ 12V
55
8
120
¾
¾
mA
Quiescent Current
(Fixed Version)
ISS
13
mA
120Hz input ripple
RR
Ripple Rejection
60
dB
¾
¾
¾
¾
COUT=22mF
D
V
O U T
Temperature Coefficient
-40°C<Ta<85°C
±0.4
mV/°C
D
T
a
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. 1.00
3
August 7, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
