Ver 1.7
BCT2019
Low Power, Low Dropout, RF-Linear Regulators
GENERAL DESCRIPTION
The BCT2019 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
BCT2019 series also offer ultra-low dropout
voltage to prolong battery life in portable
electronics. Systems requiring a quiet voltage
sources, such as RF applications, will benefit from
the BCT2019 series ultra-low output noise
(30uV
RMS
) and high PSRR. An external noise
bypass capacitor connected to the device’s BP pin
can further reduce the noise level.
The output voltage is preset to voltages in the
range of 1.2V to 5.0V. Other features include a
10nA logic-controlled shutdown mode, foldback
current limit and thermal shutdown protection.
The BCT2019 is available in Green SOT-23-5 and
SC70-5 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)
10nA Logic-Controlled Shutdown
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 5.0V
-40° to 85° Operating Temperature Range
C
C
Available in Green SC70-5 and SOT-23-5
Packages
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Portable/Battery-Powered Equipment
www.broadchip.com
1
Ver 1.7
ORDERING INFORMATION
Order Number
BCT2019EUKV12-TR
BCT2019EUKV15-TR
BCT2019EUKV18-TR
BCT2019EUKV25-TR
BCT2019EUKV28-TR
BCT2019EUKV29-TR
BCT2019EUKV30-TR
BCT2019EUKV33-TR
BCT2019EUKVAJ-TR
BCT2019EXKV12-TR
BCT2019EXKV15-TR
BCT2019EXKV18-TR
BCT2019EXKV25-TR
BCT2019EXKV28-TR
BCT2019EXKV29-TR
BCT2019EXKV30-TR
BCT2019EXKV33-TR
BCT2019EXKVAJ-TR
V
OUT
(V)
1.2
1.5
1.8
2.5
2.8
2.85
3
3.3
ADJ
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
SC70-5
SC70-5
SC70-5
SC70-5
SC70-5
SC70-5
SC70-5
SC70-5
SC70-5
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
-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
3000
3000
3000
3000
3000
3000
3000
3000
3000
F5ZZ
—
F8ZZ
—
F9ZZ
F0ZZ
F3ZZ
FJZZ
LK12
LK15
LK18
LK25
LK28
LK285
LK30
LK33
LKAJ
www.broadchip.com
2
Ver 1.7
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
SC70-5.....................................................................0.3W
Package Thermal Resistance
SOT-23-5, θ
JA
......................................................260℃/W
SC70-5, θ
JA
..........................................................330℃/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.....................................................................2000V
MM.........................................................................200V
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.
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.
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.
www.broadchip.com
3
Ver 1.7
PIN CONFIGURATION
SOT23-5/SC70-5
TOP VIEW
IN
1
MARKING
5
OUT
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
www.broadchip.com
4
Ver 1.7
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(NOMINAL)
+0.5V
(1)
, Full = -40℃ to +85℃, unless otherwise specified.)
PARAMETER
Input Voltage
Output Voltage Accuracy
(1)
Maximum Output Current
Current Limit
Ground Pin Current
Dropout Voltage
(2)
Line Regulation
ΔV
LNR
I
LIM
I
Q
No load, EN=2V
I
OUT
=1mA
I
OUT
=300mA
V
IN
=2.5V or (V
OUT
+0.5V) to
5.5V, I
OUT
=1mA
I
OUT
=0.1mA to 300mA,
C
OUT
=1uF, V
OUT
>2V
I
OUT
=0.1mA to 300mA,
C
OUT
=1uF, V
OUT
≤2V
f=10Hz to 100kHz,
C
BP
=0.01uF, C
OUT
=10uF
SYM
V
IN
I
OUT
=0.1mA
SOT-23-5
V
OUT
=1.2V,1.5V,1.8V, SC70-5
V
OUT
>2V, SC70-5
CONDITIONS
MIN
2.5
-2.5
300
150
250
800
100
0.9
270
0.02
400
0.05
200
mA
uA
mV
%/V
mA
TYP
MAX UNITS
5.5
2.5
V
%
0.002 0.005
%/mA
0.004 0.008
30
77
74
1.5
0.3
0.01
0.01
30
1
uV
RMS
Load Regulation
ΔV
LDR
Output Voltage Noise
e
n
Power Supply Rejection Ratio
SHUTDWON
(3)
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay
(4)
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
NOTES:
f=
C
BP
=0.1uF,
PSRR I
LOAD
=50mA, C
OUT
=1uF, 217Hz
V
IN
=V
OUT
+1V
f=1kHz
V
IH
V
IL
V
IN
=2.5V to 5.5V,
V
EN
=-0.3V to V
IN
dB
V
uA
uA
us
I
B(SHDN)
EN=0V or EN=5.5V
I
Q(SHDN)
EN=0.4V
C
BP
=0.01uF, C
OUT
=1uF,
No Load
T
SHDN
ΔT
SHDN
150
15
°
C
°
C
1. V
IN
= V
OUT (NOMINAL)
+ 0.5V or 2.5V, whichever is greater.
2. The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 0.5V.
(Only applicable for V
OUT
= +2.5V to +5.0V.)
3. V
EN
= -0.3V to V
IN
4. Time needed for V
OUT
to reach 90% of final value.
www.broadchip.com
5
PCB设计
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