regulator devices with high output voltage accuracy,
low quiescent current, low on-resistance, and high
ripple rejection. Each of the devices includes a voltage
reference, error amplifier, resistor-network for voltage
setting, current limit circuit, chip enable circuit and so
on.
The HT75Bxx’s current limiters' fold back circuit
also operates as a short circuit protect function for the
output current limiter.
These devices offer the benefits of low dropout
voltage as well as possessing a chip-enable function.
Additional features include an exceptionally low
10
μ
A quiescent current in addition to excellent line
and load transient response characteristics. With these
features the devices will be appropriate for use in a
wide range of application among which would include
hand-held communication equipment.
The space-saving SOT23-5, SOT89 package will be
an attractive additional feature for pocket and hand-
held applications.
Applications
●
Portable communication equipment
●
Portable music player
●
Electrical appliances such as cameras,
VCRs and camcorders
●
Battery-powered equipment
Selection Table
Part No.
HT75B15
HT75B18
HT75B25
HT75B28
HT75B30
HT75B33
HT75B50
Output Voltage
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
5.0V
±2%
SOT23-5
SOT89
Tolerance
Package
Rev. 1.00
1
August, 9, 2011
HT75Bxx
Block Diagram
V
IN
Short Current
Shutdown
V
OUT
CE
V
ref
GND
Absolute Maximum Ratings (Note1)
Maximum Input Supply Voltage...........................................................................................................................7.5V
Ambient Temperature Range ................................................................................................................ -40°C ~ +85°C
Thermal Information
Symbol
Q
JA
Parameter
Thermal Resistance
(Junction to Ambient)
(Assume no ambient airflow,
no heat sink)
Power Dissipation
Package
SOT23-5
SOT89
SOT23-5
SOT89
Max.
500
200
0.20
0.50
Unit
°C/W
°C/W
W
W
P
D
Note: P
D
is measured at Ta= 25°C
Rev. 1.00
2
August, 9, 2011
HT75Bxx
Pin Assignment
S O T 2 3 -5
V O U T
N C
SOT89
HT75Bxx
HT75Bxx
T o p V ie w
GND
V IN
G N D
C E
V
IN
V
OUT
S id e V ie w
V IN
G N D
C E
GND
V
IN
V
OUT
SOT23-5 Pin Descriptions
Pin No.
1
2
3
4
5
Symbol
VIN
GND
CE
NC
VOUT
Input Pin
Ground Pin
Chip Enable Pin - high enable
No Connection
Output Pin
SOT89 Pin Descriptions
Pin No.
1
2
3
Symbol
GND
VIN
VOUT
Ground Pin
Input Pin
Output Pin
Description
Description
Rev. 1.00
3
August, 9, 2011
HT75Bxx
Electrical Characteristics
Ta=25
°C
, V
IN
=V
OUT
+1V, I
OUT
=30mA, unless otherwise specified (Note2)
Symbol
V
IN
∆V
OUT
∆V
LINE
∆V
LOAD
Parameter
Input Voltage
Output Voltage Tolerance
Line Regulation
Test Conditions
1.5V≤V
OUT
≤5V
1mA≤I
OUT
≤30mA
1.5V≤V
OUT
≤5.0V
V
OUT
+0.5V≤V
IN
≤7.0V, I
OUT
=10mA
1.5V≤V
OUT
≤1.8V
Load Regulation (Note 3) 1mA≤I
OUT
≤150mA
2.5V≤V
OUT
≤3.0V
V
OUT
≥3.3V
V
DROP
I
SHORT
I
SS
I
SD
V
IH
V
IL
R
R
V
NOISE
T
C
∆V
OUT
=2%
Dropout Voltage (Note 4)
I
OUT
=150mA
Short Current Limit
Supply Current
Shutdown Current
V
OUT
=0V
I
OUT
=0mA
CE=GND
V
OUT
=1.5V
V
OUT
=1.8V
2.5V≤V
OUT
≤5.0V
Min.
2.5
-2
—
—
—
—
—
—
—
—
—
—
1
0
f=1kHz
f=10kHz
—
—
—
—
Typ.
—
—
0.02
13
14
15
0.54
0.44
0.33
50
10
0.1
—
—
70
53
30
±100
Max.
7
+2
0.1
30
35
40
0.86
0.65
0.46
—
20
1
7
0.3
—
—
—
—
mA
μA
μA
V
V
dB
μVrms
ppm/°C
V
mV
Unit
V
%
%/V
CE Input High Threshold V
OUT
+1V≤V
IN
≤7V
CE Input Low Threshold V
OUT
+1V≤V
IN
≤7V
Ripple Rejection
Output Noise
Temperature Coefficient
I
OUT
=30mA
Bandwidth=10Hz to 100kHz
T
C
=
∆
V
OUT
∆
T
a
•
V
OUT
I
OUT
=30mA, -40°C≤Ta≤85°C
Note 1. Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating
Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific
performance limits. The guaranteed specifications apply only for the test conditions listed.
2. Specifications are production tested at T
a
=room temperature. Specifications over the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with Statistical
Quality Controls (SQC).
3. Load regulation is measured at constant junction temperature, using pulse testing with a short ON time.
The devices are 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 P
D
=(T
J(MAX)
–T
a
)/θ
JA
.
4. Dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a
specified output current. Under dropout conditions, the output voltage will be equal to: V
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