SE5168
150mA CMOS LDO Regulator
Description
The SE5168 series of fixed output low dropout
linear regulators are designed for portable battery
powered applications, which require low dropout
voltage and low ground current.
Each device
contains a voltage reference unit, an error amplifier,
a PMOS power transistor, and resistors for setting
output voltage, and current limit and temperature
limit protection circuits.
The SE5168 has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0μF. Standard voltage versions
are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3V.
Features
Typical Low Dropout Voltage of 200mV at
75mA.
Guaranteed 150mA output over the full
operating temperature range.
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Typical Low Ground Current at 50μA
Current Limiting and Thermal Protection.
Standard SOT-23-3L, TO-92, and SC70
(SOT-323-3L) Package.
Applications
Cellphones.
Wireless LAN’s.
Hand-Held Instrumentation.
Portable Video Game Devices.
Digital Cameras.
Marking Information
SE5168AHN
YYWW
SE5168BHN
YYWW
SE5168CHN
YYWW
SE5168DHN
YYWW
SE5168EHN
YYWW
SE5168FHN
YYWW
SE5168AHG
YYWW
SE5168BHG
YYWW
SE5168CHG
YYWW
SE5168DHG
YYWW
SE5168EHG
YYWW
SE5168FHG
YYWW
Ordering/Marking Information
Package
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
Revision
12/5/2008
SE5168AHN
SE5168BHN
SE5168CHN
SE5168DHN
SE5168EHN
SE5168FHN
SE5168AHG
SE5168BHG
SE5168CHG
SE5168DHG
SE5168EHG
SE5168FHG
YY: year code
WW: week code.
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 1
SE5168
150mA CMOS LDO Regulator
Ordering/Marking Information (Continued)
Package
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
SE5168ALN
SE5168BLN
SE5168CLN
SE5168DLN
SE5168ELN
SE5168FLN
SE5168ALG
SE5168BLG
SE5168CLG
SE5168DLG
SE5168ELG
SE5168FLG
SE5168APN
SE5168BPN
SE5168CPN
SE5168DPN
SE5168EPN
SE5168FPN
SE5168APG
SE5168BPG
SE5168CPG
SE5168DPG
SE5168EPG
SE5168FPG
168AN_
168BN_
168CN_
168DN_
168EN_
168FN_
168AG_
168BG_
168CG_
168DG_
168EG_
168FG_
6AN
6BN
6CN
6DN
6EN
6FN
6AG
6BG
6CG
6DG
6EG
6FG
Starting with 1, a bar on top of 1 is
for production year 2001, and
underlined 1 is for year 2002.
The
next character is marked on top for
2003, and underlined for 2004. The
naming pattern continues with
consecutive characters for later
years.
The last character is the week
code. (
A-Z:
Marking Information
1-26, a-z: 27-52)
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 2
SE5168
150mA CMOS LDO Regulator
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) ..…….........................+6V
Power Dissipation (P
D
) ……….. Internally Limited
(3)
Operating Ratings
(2)
Supply Input Voltage (V
IN
) ……...... +2.0V to +5.5V
Junction Temperature (T
J
) …….….. 0°C to +125°C
Package Thermal Resistance
160°C/W (TO-92)
230°C/W (SOT-23-3L)
250°C/W (SC70)
Junction Temperature (T
J
) ……...................…150°C
Lead Temperature (soldering, 5 sec.) …....…. 260°C
Storage Temperature (T
S
) ……….. -40°C to +150°C
Electrical Characteristics
V
IN
=5V; C
IN
= 2.2μF; C
OUT
= 2.2μF（
Electrolytic
capacitor
）;
I
OUT
= 10mA; T
J
= 25°C; unless otherwise noted
Conditions
Min
1.470
1.764
2.450
2.744
2.940
3.234
--
--
Typ
1.5
1.8
2.5
2.8
3.0
3.3
1
1
Max
1.530
1.836
2.550
2.856
3.060
3.366
--
--
Unit
V
V
V
V
V
V
%/V
%
Symbol
Parameter
V
OUT
Output Voltage
Accuracy
SE5168 – 1.5V(V
IN
=1.8V,I
OUT
=1mA)
SE5168 – 1.8V(V
IN
=3.3V,I
OUT
=10mA)
SE5168 – 2.5V
SE5168 – 2.8V
SE5168 – 3.0V
SE5168 – 3.3V
V
IN
= (V
OUT
+ 1)V to 5.5V
V
IN
=(V
OUT
+ 1)V or 2.7V
I
OUT
= 10mA to 150mA
Note 4
ΔV
OUT
ΔV
OUT
Line Regulation
Load Regulation
Output Voltage
(5)
ΔV
OUT
/ΔT
Temperature
Coefficient
Dropout Voltage
(6)
(V
OUT
>2V)
Thermal
Protection
Ripple Rejection
Quiescent Current
Current Limit
--
0.033
--
mV/°C
I
OUT
= 10mA
I
OUT
= 75mA
I
OUT
= 150mA
Thermal Protection Temperature
Protection Hysterisys
f = 120 Hz
I
OUT
= 10mA
--
--
--
--
--
--
--
--
20
200
500
150
20
57
50
200
--
--
--
--
--
--
--
--
°C
dB
μA
mA
mV
V
IN
– V
OUT
T
PROTECTION
PSRR
I
Q
I
LIMIT
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 3
SE5168
150mA CMOS LDO Regulator
Note 1:
Exceeding the absolute maximum rating may damage the device.
Note 2:
The device is not guaranteed to function outside its operating rating.
Note 3:
The maximum allowable power dissipation at any T
A
(ambient temperature) is calculated using: P
D(MAX)
=
(T
J(MAX)
– T
A
)/Θ
JA
. Exceeding the maximum allowable power dissipation will result in excessive die temperature,
and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details
Note 4:
Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range.
Note 5:
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested
for load regulation in the load range from 0.1mA to 150mA.
covered by the thermal regulation specification.
Note 6:
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Note 7:
The Cin or Cout should be chosen carefully. Please refer to the Application Hints
Changes in output voltage due to heating effects are
Typical Application
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 4
SE5168
150mA CMOS LDO Regulator
Line Regulation (VOUT = 3.3V)
(VIN = 4.3V to 5V, IOUT = 1mA
)
3.6000
3.5000
VOUT (V)
VOUT (V)
3.4000
3.3000
3.2000
3.1000
3.0000
4.2
4.7
5.2
VIN (V)
5.7
3.6000
3.5000
3.4000
3.3000
3.2000
3.1000
3.0000
0
50
100
IOUT (mA)
150
Load Regulation (VOUT = 3.3V)
(VIN = 5V, IOUT = 1mA to 150mA)
Output Voltage vs Temperature
(VIN = 3.3V, IOUT = 10mA)
1.600
IQ vs IOUT (VOUT = 1.5V)
(VIN = 3.3V, IOUT = 1mA to 150mA)
100
90
80
Output Voltage(V)
1.550
70
IQ (uA)
20
30
40
50
60
70
80
90
100
110
120
60
50
40
30
20
10
1.500
1.450
1.400
0
0
20
40
60
80
100
120
140
160
Temperature(C)
IOUT (mA)
Transient Response (V
OUT
= 1.5V)
Power Supply Rejection Ratio
(PSRR)
(VIN = 5V, VPP = 1V)
70.0
(I
OUT
= 1mA to 50mA)
65.0
PSRR(dB)
60.0
55.0
50.0
45.0
40.0
10
100
1000
10000
100000
Frequency(Hz)
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 5
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