BCT2028
500mA, Low Dropout,
Linear Regulators
BCT2028
500mA Low Dropout Linear Regulators
GENERAL DESCRIPTION
The BCT2028 series low-power, low-noise,
low-dropout, CMOS linear voltage regulators
operate from a 2.5V to 5.5V input voltage. They
are the perfect choice for low voltage, low power
applications. A low ground current makes this part
attractive for battery operated power systems. The
BCT2028 series also offer ultra-low dropout
voltage to prolong battery life in portable
electronics. Output current minimum limit is
500mA, and over-current protection limit is set at
700mA typical. An external noise bypass capacitor
connected to the device’s BP pin can further
reduce the noise level.
These devices feature a shutdown function and
are offered in active low with auto discharge. The
output voltage is preset to voltages in the range of
1.2V to 3.3V. Other features include a low
shutdown current, fold-back current limit and
thermal shutdown protection.
The BCT2028 is available in Green SOT23-5
packages. It operates over an ambient
temperature range of -40° to +85°
C
C.
FEATURES
Low Output Noise
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
High PSRR(74dB at 1kHz)
500mA Current Rating
Available in Multiple output Voltage Versions
Fixed Outputs of 1.2V, 1.5V, 1.8V, 2.5V, 2.8V,
2.85V, 3.0V and 3.3V
Adjustable Output from 1.2V to 3.3V
Quick output discharge
-40° to 85° Operating Temperature Range
C
C
Available in Green SOT23-5 Packages
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Portable/Battery-Powered Equipment
REV1.7
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
1
BCT2028
500mA, Low Dropout,
Linear Regulators
ORDERING INFORMATION
Order Number
BCT2028EUK12-TR
BCT2028EUK15-TR
BCT2028EUK18-TR
BCT2028EUK25-TR
BCT2028EUK28-TR
BCT2028EUK29-TR
BCT2028EUK30-TR
BCT2028EUK33-TR
BCT2028EUKAJ-TR
V
OUT
(V)
1.2
1.5
1.8
2.5
2.8
2.85
3
3.3
ADJ
Package Type
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
Temperature Range
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
-40° to +85°
C
C
Marking
F2ZZ
F5ZZ
F8ZZ
—
QTY/Reel
3000
3000
3000
3000
3000
3000
3000
3000
3000
F5ZZ
—
F8ZZ
—
F9ZZ
F0ZZ
F3ZZ
FJZZ
ORDER NUMBER
BCT2028
X XX XX -TR
Tape and Reel
Output Voltages:
12: 1.2V
15: 1.5V
18:1.8V
25:2.5V
28:2.8V
29:2.85V
30:3.0V
33:3.3V
AJ:ADJ
Package Type:
UK: SOT23-5
Operating Temperature Range:
E: -40℃ to +85℃
REV1.7
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
2
BCT2028
500mA, Low Dropout,
Linear Regulators
MARKING DESCRIPTION
F：Product Code
X: Output Voltage Code
V
OUT
(V)
1.2
1.5
1.8
2.5
2.8
2.85
3.0
3.3
ADJ
Code
2
5
8
5
8
9
0
3
J
—
—
—
Z: The year of manufacturing, “1” stands for year 2011, “2” stands for year 2012, “7” stands for year 2017
and “8” stands for year 2018.
_
_
Z: The week of manufacturing. “A” stands for week 1, “Z” stands for week 26, “A” stands for week 27, “Z”
stands for week 52.
REV1.7
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
3
BCT2028
500mA, Low Dropout,
Linear Regulators
ABSOLUTE MAXIMUM RATINGS
IN to GND.......................................................-0.3V to 6V
EN to GND……………....................................-0.3V to V
IN
OUT, BP/FB to GND...........................-0.3V to (V
IN
+0.3V)
Output Short-Circuit Duration.................................Infinite
Power Dissipation, P
D
@T
A
=25℃
SOT-23-5..................................................................0.4W
Package Thermal Resistance
SOT-23-5, θ
JA
.......................................................250℃/W
Junction Temperature..............................................150℃
Operating Temperature Range.................-40℃ to +85℃
Storage Temperature Range....................-65℃ to 150℃
Lead Temperature (Soldering, 10 sec).....................260℃
ESD Susceptibility
HBM.....................................................................4000V
MM.........................................................................400V
Broadchip reserves the right to make any change in circuit
design, specification or other related things if necessary
without notice at any time. Please contact Broadchip sales
office to get the latest datasheet.
CAUTION
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. Broadchip recommends
that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and
installation procedures can cause damage. ESD damage
can range from subtle performance degradation to
complete device failure. Precision integrated circuits may
be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
NOTE:
Stresses beyond those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any
other conditions beyond those indicated in the operational
sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device
reliability.
REV1.7
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
4
BCT2028
500mA, Low Dropout,
Linear Regulators
PIN CONFIGURATION
SOT23-5
TOP VIEW
IN
1
5
OUT
MARKING
GND
2
EN
3
4
BP/FB
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
2
3
IN
GND
EN
BP
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a
1uF capacitor to GND.
Ground.
Shutdown Input. A logic low reduces the supply current to 10nA. Connect to
IN for normal operation.
Reference-Noise Bypass (fixed voltage version only). Bypass with a
low-leakage 0.01uF ceramic capacitor for reduced noise at the output.
Adjustable Voltage Version Only. This is used to set the output voltage of the
device.
Regulator Output.
4
FB
5
OUT
REV1.7
www.broadchip.com
Copyright © BROADCHIP TECHNOLOGY CO., LTD
5
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