L1212 Series
SOT-23
1
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
GENERAL DESCRIPTION
The L1212 Series are positive and low
dropout voltage regulators with 200mA
output current capability. These devices are
designed for use in low voltage applications
that offers lower dropout voltage and faster
transient response.
These devices are fully protected against
over current faults, over temperature
operation, transient voltage spike …etc.
On-Chips trimming the reference voltage to
1% and features the low dropout of typical
0.2 volts at 200mA typical.
The L1212 Series regulators offer fixed
voltage options available in the popular
industry standard SOT-23, and SOT-25
packages.
FEATURES
z Fixed 1.5V, 1.8V, 2.5V, 3.3V output voltage
z Low dropout voltage:
0.2V typical at up to 200mA
z Small output capacitor
z Low ground current
z Fast transient response
z Current & thermal limiting
z Line regulation: 0.2%/V typical
z Load regulation: 0.002%/mA typical
z SOT-23, SOT-25 package
APPLICATIONS
z 5V to 2.5V or 3.3V linear regulators
z Low voltage micro-controllers
z Battery Chargers
z Motherboard clock supplies
z Post regulator for switching supplies
z Micro-controllers
Function Block Diagram
& Thermal
Protection
Current Limit
-
+
R1
Fixed Voltage Type
R2
1.25V
Bandgap
Reference
GND
100
IN
OUT
Shutdown
Logic
-
+
L1212 Series
SOT-23
2
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
ELECTRICAL CHARACTERISTICS for Fixed Voltage (Unless otherwise sp ecified, TA = 25°C)
Parameter Symbol Test Conditions Min. Typ. Max.
IOUT = 50mA 2.5V 6.5V
Input Voltage
Range VIN 2.8V 6.5V
Output Voltage VO V
IN = VOUT + 1V, IOUT = 1mA VO-35mV VO V
O+35mV
ΔVO = 1%, IOUT = 100mA 0.06V 0.1V
Dropout Voltage VD ΔVO = 1%, IOUT = 200mA 0.2V 0.3V
Line Regulation △VLINE (VOUT + 1.0V) ≤ VIN ≤ 6.5V, IOUT = 1mA 0.2%/V 0.3%/V
Load Regulation △VLOAD 0mA ≤ IOUT ≤ 0.2A 0.002%/mA 0.003%/mA
Ground Pin
Current IG I
OUT = 0mA
IOUT = 200mA 65µA
65µA 90µA
150µA
Current Limit ICL 0.25A 0.4A
Shutdown Input
High Threshold VIH V
IN=3V to 5.5V 1.6V
Shutdown Input
Low Threshold VIL V
IN=3V to 5.5V 0.4V
Shutdown Bias
Current ISD 100nA
Shutdown Supply
Current IGSD 0.01uA 1uA
Thermal Shutdown
Protection TSD 170℃
RMS Output Noise VN Freq. = 1Hz to 10KHz, COUT=10uF
80μVRMS
Ripple Rejection PSRR Freq. = 10KHz, COUT = 10µF 75dB
ABSOLUTE MAXIMUM RATINGS
z Maximum Supply Voltage 7V z Operating Junction
Temperature Range -40 to 125 °C
z Power Dissipation 0.25W z Storage Temperature
Range -65 to 150 °C
z Thermal Resistance
Junction to Case, θJA 250 °C/W z Lead Temperature
(Soldering, 10 Seconds) 275 °C
L1212 Series
SOT-23
3
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
DEVICE SELECTION GUIDE
Device L1212M3-1.5A L1212M3-1.8A L1212M3-2.5A L1212M3-3.3A
Voltage Version 1.5 1.8 2.5 3.3
Package SOT-23 SOT-23 SOT-23 SOT-23
Marking 1215A 1218A 1225A 1233A
Device L1212M5-1.5Z L1212M5-1.8Z L1212M5-2.5Z L1212M5-3.3Z
Voltage Version 1.5 1.8 2.5 3.3
Package SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5
Marking 1215Z 1218Z 1225Z 1233Z
Device L1212M5-1.5Y L1212M5-1.8Y L1212M5-2.5Y L1212M5-3.3Y
Voltage Version 1.5 1.8 2.5 3.3
Package SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5
Marking 1215Y 1218Y 1225Y 1233Y
TYPICAL APPLICATION
L1212X-XX
Vin Vout
GND
SHDN BP
10nF
OFF
1uF1uF
ON
1uF
GND
L1212X-XX
Vin Vout VoutVin
1uF
L1212 Series
SOT-23
4
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
PIN CONFIGURATIONS
2
13
54
123
Pin # Function
1 Ground
2 Input
3 Output
L1212M3-XXA PIN Assignment
Pin # Function
1 Input
2 Ground
3 SHDN
4
BP
5 Output
L1212M5-XXZ PIN Assignment L1212M5-XXY PIN Assignment
Pin Description
Pin Name Pin Function
Input Input
Ground Ground
SHDN Active Low Shutdown Input
BP
Reference Noise Bypass
Output Output
Pin # Function
1 Output
2 Ground
3 Input
4 SHDN
5
B
P
L1212 Series
SOT-23
5
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
Typical Performance Characteristics
L
oa
d
C
urrent
( mA )
O
utput
V
o
l
tage
Deviation( mV )
Load T ransient Response
FC out
µ
1=,FC in
µ
10=,nFC BP 10=
100
0
-100
100
10
Load T ransient Response
FC out
µ
10
=
,FC in
µ
10=,nFC BP 10=
VV
VV
OUT
IN 3.3
5
=
=
100
0
-100
200
10
O
utput
V
o
l
tage
Deviation( mV )
L
oa
d
C
urrent
( mA )
Time 200μS / div Time 200μS / div
L1212 Series
SOT-23
6
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
Line T ransient Response
FC out
µ
1=,FC in
µ
10=,nFC BP 10=
I
nput
V
o
l
tage
Deviation( V )
5
4
2
50
-50
O
utput
V
o
l
tage
Deviation( mV )
Time 10mS / div
L1212 Series
SOT-23
7
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
SOT-23 (M3) MECHANICAL DATA
mm mm
Dimension Min. Typ. Max.
Dimension Min. Typ. Max.
A 0.85 1.15 H 0.1 0.15 0.25
B 2.4 3 I 0.37
C 1.4 1.6 1.8 J
D 2.7 2.9 3.1 K
E 1 1.1 1.3 L
F 0 0.1 M
G 0.35 0.5 N
D
E
G
B
F
C
A
13
2
I
H
L1212 Series
SOT-23
8
200mA Fixed Voltage Low
Dropout Linear Regulator (LDO) - Preliminary
NOV-03-2004
NIKO-SEM
SOT-23 (M5) MECHANICAL DATA
mm mm
Dimension Min. Typ. Max.
Dimension Min. Typ. Max.
A 1.0 1.10 1.30 e 1.90(TYP)
A1 0.00 0.10 H 2.60 2.80 3.00
A2 0.70 0.80 0.90 L 0.37
b 0.35 0.40 0.50
C 0.10 0.15 0.25
D 2.70 2.90 3.10
E 1.40 1.60 1.80
b
A
A1A2
HE
e
DC
L
