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
How can I make the eight lights flash once per second? There is no requirement for the flashing pattern. The eight lights are connected to PD0~PD7 in sequence. I have just come into contact with ATmeg...
I went to a relatively desolate place in the morning. I entered the factory building without any intention and saw rows of equipment and computers. Later, I finally found the interviewer and talked fo...
In portable communication devices, such as cellular phones and digital cordless phones, high-frequency, low-power, low-noise amplifiers are needed to amplify very weak RF signals without distortion. T...
The rapid development of the Internet has realized high-speed information transmission and resource sharing, greatly facilitating people's lives. Embedded systems are widely used in various electr...[Details]
In early 2002, I started to write a working program for an IC card prepaid electricity meter. The meter used Philips' 8-bit 51-expanded single-chip microcomputer
87LPC764
, and wa...[Details]
1. Introduction
This design was made for participating in an electronic design competition. It effectively solved the problem of the operation and control of an electric car on a seesaw. The s...[Details]
With the advent of increasingly powerful processors, image sensors, memory, and other semiconductor devices, as well as the algorithms that enable them, computer vision can be implemented in a wide...[Details]
introduction
Solar cells and LED lighting are typical applications of new energy and energy-saving and efficient technologies. Solar LED lighting uses solar cells to convert solar energy...[Details]
In this article, the high-performance DSP developed by TI can be used as an effective confidentiality method if it is applied to PC encryption cards.
As an effective network security solution,...[Details]
Images in science fiction movies often break through the limits of reality, such as in the movie "Minority Report." Tom Cruise uses a multi-touch screen to browse information. Capacitive sensing te...[Details]
Editor's note: In order to help technicians or engineers who have knowledge of PIC microcontroller assembly language quickly master the method of using C language to program PIC microcontrollers, t...[Details]
Vertical cavity surface emitting lasers (VCSELs) are gradually replacing traditional edge emitting lasers, especially in low bandwidth and short-distance communication systems where cost factors ar...[Details]
Contact resistance
is the resistance to current flow through a closed pair of contacts. This type of measurement is performed on devices such as connectors,
relays
, and switches. The...[Details]
1. Overview
The Virtual CAN Interface (VCI) function library is an application program interface specifically provided for the use of ZLGCAN devices on PCs. The functions in the library ar...[Details]
1. Project Introduction
Shandong Dezhou Xingtai Paper Co., Ltd. is a newly built high-end paperboard production enterprise with domestic leading level established by Shandong Zhaodongfang Pape...[Details]
1 Introduction to HART Protocol
HART (Highway Addressable Remote Transducer), an open communication protocol for addressable remote sensor high-speed channels, was launched by Rosemen in the U...[Details]
Xiaomi, a well-known Internet phone in mainland China, won a million-unit order contract from China Unicom on November 20 last year, which made Xiaomi famous in mainland China. In April this year...[Details]
Capacitors
are basic components in various electronic devices and are widely used for bypassing, coupling,
filtering
, tuning, etc. in electronic circuits. However, to use capacitors,...[Details]
Microchip MCU
京公网安备 11010802033920号
EEWORLD
