FS8832<Preliminary>
150 mA Low Noise LDO Linear Regulator
General Description
The FS8832 is a low-noise, low-dropout linear
regulator that operates from 2.5V to 6.5V input
voltage range and delivers up to 150mA output
current. Typical output noise for the device is just
40µV
RMS with
an external capacitor connected to the
noise bypass pin to reduce the output noise level.
Typical dropout voltage is 240mV at 150mA.
The high-accuracy (
±
35mV) output voltage is
preset at an internally trimmed voltage 2.5V,
2.85V, 3.0V or 3.3V. Other output voltages can be
mask-optioned from 1.5V to 5.0V with 100mV
increment, except FS8832-29Cx which has 2.85V
output voltage.
The FS8832 consists of a voltage reference, a
comparator, a P-channel pass transistor, and an
enable/disable logic circuit. Other features include
short-circuit
protection,
thermal
shutdown
protection, and auto-discharge function. The
auto-discharge function actively discharges the
output voltage to ground when the device is
placed in shutdown. The FS8853 devices are
available in SOT-23-5 package.
Ordering Information
FS8832-xx x x
Package
A : SOT-23-5
B : SOT-23-5
1.IN
4.NC
1.EN
4.OUT
Pin Out
2.GND 3.EN
5.OUT
2.GND 3.NC
5.IN
Temperature Range
C : Commercial Standard
P : Commercial Standard, Lead(Pb) Free
and Phosphorous(P) Free Package
Output Voltage
15 : 1.5V
16 : 1.6V
17 : 1.7V
18 : 1.8V
19 : 1.9V
20 : 2.0V
21 : 2.1V
22 : 2.2V
23 : 2.3V
24 : 2.4V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
29 : 2.85V
30 : 3.0V
31 : 3.1V
32 : 3.2V
33 : 3.3V
34 : 3.4V
35 : 3.5V
36 : 3.6V
37 : 3.7V
38 : 3.8V
39 : 3.9V
40 : 4.0V
41 : 4.1V
42 : 4.2V
43 : 4.3V
44 : 4.4V
45 : 4.5V
46 : 4.6V
47 : 4.7V
48 : 4.8V
49 : 4.9V
50 : 5.0V
Features
Low output noise: 40µV
RMS
（Typ.）
100mA
at
output current
Low 240mV dropout at 150mA output
High output voltage accuracy:
±35mV
Preset at 2.5V, 2.85V, 3.0V, 3.3V
Mask options from 1.5V to 5.0V
Low 70µA quiescent current（Typ.）
Logic control shutdown
Auto-discharge function
Output current limit
Thermal overload shutdown protection
SOT23-5 Package
Note :
Output Voltage is preset at
2.5V, 2.85V, 3.0V or 3.3V,
and standard package type is
‘A’ type. Mask option output
voltages and ‘B’ package
type are available by special
order only.
Pin Configurations
Part
No.
Pin
1
Pin Pin Pin Pin
2
3
4
5
FS8832
IN GND EN BP OUT
-xxxA
FS8832
EN GND BP OUT IN
-xxxB
Applications
Cellular Telephones
Cordless Telephones
PCS Telephone
Wireless Handsets
Palmtop Computer
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
1/10
FS8832-DS-02_EN
Rev. 0.2
Mar. 2005
FS8832<Preliminary>
Package Marking Information
EX：FS8832-29PA
EX：FS8832-33CA
Top Point: Lot No.
Bottom Point: Year
w : week, A~Z & A ~ Z
A Dot After Marking : Pb/P Free
Top Point: Lot No.
Bottom Point: Year
w : week, A~Z & A ~ Z
Pin description
Part NO.
Symbol
IN
FS8832-xxxA
FS8832-xxxB
GND
EN
BP
OUT
Regulator input.
Ground.
Enable pin.
An external bypass capacitor connect node.
Regulator voltage output.
Description
IN
is the regulator input. Supply voltage can range from 2.5V to 9.0V. Bypass with a 1µF capacitor to
GND.
GND
provides the reference for all voltages. This pin also functions as a heat sink. Solder to a large
pad or the circuit-board ground plane to maximize power dissipation.
EN
is the output voltage ON/OFF control pin. When in shutdown, OUT is driven low. It needs 2V supply
at En pin to active the chip. The EN pin input voltage must be less than the input voltage at IN pin.
BP
is the reference-noise bypass. Bypass with a low-leakage, 0.01µF ceramic capacitor to reduce
noise at the output.
OUT
is the output voltage. Sources up to 150mA. Bypass with a 3.3µF capacitor to GND
Fortune Semiconductor Corp.
2/10
Rev. 0.2
FS8832<Preliminary>
Typical Application Schematic
INPUT
2.5V
TO
9.0V
IN
1µF
OUT
3.3µF
GND
OFF
2V
ON
EN
BP
0.01µF
Function block diagram
IN
EN
Reverse
Battery
Protection
Current
Lim it
Shutdown
Logic
Therm al
Protection
O UT
1.25V
Bandgap
Reference
BP
G ND
Fortune Semiconductor Corp.
3/10
Rev. 0.2
FS8832<Preliminary>
Absolute Maximum Ratings
Input voltage V
IN
to GND ---------------------------------------------------------------------------------------------------- 10V
EN to GND ----------------------------------------------------------------------------------------------------------------------- V
IN
Output short-circuit duration --------------------------------------------------------------------------------------- Continuous
Output current limit, I
(LIMIT)
----------------------------------------------------------------------------------------------- 500mA
Continuous power dissipation, P
D
(∆T= T
J
-T
A
= 100°C)
SOT-23-5
-----------------------------------------------------------------------------------------------------------------------------------------
400mW
* The power dissipation values are based on the condition that junction temperature T
J
and ambient
temperature T
A
difference is 100°C.
Junction Temperature, T
J
------------------------------------------------------------------------------------------------ +155°C
Storage temperature range, T
STG
----------------------------------------------------------------------- -55°C to +150°C
Operating junction temperature range ------------------------------------------------------------------ -40°C to +125°C
Lead temperature (soldering, 10sec) --------------------------------------------------------------------------------- 260°C
*
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These
are stress ratings only, and function operation of the device at these or any other conditions beyond those indicated
under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for
extended periods may affect device reliability.
Fortune Semiconductor Corp.
4/10
Rev. 0.2
FS8832<Preliminary>
Electrical Characteristics
(V
IN
=5.0V, T
A
=0°C to +70°C, unless otherwise noted. Typical values are at T
A
=+25°C)
Symbol
Parameter
Test Conditions
Min
V
IN
V
OUT
I
MAX
I
LIMIT
I
Q
Input Voltage
Output Voltage Accuracy
Maximum Output Current
Current Limit
Ground Pin Current
V
IN
=V
OUT
+1V, I
OUT
=30mA
V
OUT
+1V≦V
IN
I
OUT
=150mA
V
IN
=V
OUT
+1V, I
OUT
=150mA
V
IN
=V
OUT
+1V, No Load
I
OUT
=1mA
V
DROP
Dropout Voltage
V
OUT
=3.3V
I
OUT
=50mA
I
OUT
=150mA
∆V
LINE
Line Regulation
Vin=2.5V or (V
OUT
+0.4) to 6.5V,
I
OUT
=1mA
I
OUT
=150mA
F=10Hz to 100KHz, C
BP
=0.01µF,
C
OUT
=10µF, I
OUT
=100mA
F=1KHz, C
OUT
=3.3µF
V
OUT
=0
2.5V<V
IN
<6.5V
2.5V<V
IN
<6.5V
EN=IN or GND
EN=0V
0.05
300
2.0
0.4
0.1
600
2.5
V
OUT-
0.035
150
Typ
V
OUT
380
70
70
1.6
80
240
0.15
0.01
40
60
0.01
Max
6.5
V
OUT
+
0.035
500
120
120
2.5
125
375
0.3
0.02
Unit
V
V
mA
mA
µA
µA
mV
mV
mV
%/V
%/mA
µV
RMS
dB
∆V
LOAD
Load Regulation
e
N
PSRR
I
SD
V
IH
V
IL
I
EN
Output Noise
PSRR
Shutdown Supply Current
Input Threshold High
Input Threshold Low
Input Bias Current
Out Discharge Resistance
in Shutdown
SHUTDOWN
1
µA
V
V
µA
Ω
THERMAL PROTECTION
T
SD
T
HYS
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
Thermal Resistance
SOT-23-5
SOT-89-5
155
10
250
180
°C
°C
°C/W
°C/W
θ
JA
Fortune Semiconductor Corp.
5/10
Rev. 0.2
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