500mA CMOS LDO Voltage Regulator
(Preliminary)
Description
The SE5218 series of fixed output low dropout
linear regulators are designed for portable battery
powered applications, which require low noise
environment, fast enable response time, and low
dropout voltage.
Each device contains a bandgap
voltage reference, an error amplifier, a PMOS power
transistor, and resistors for setting output voltage, and
current limit and temperature limit protection circuits.
The SE5218 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.
SE5218
Features
Typical 175mV Dropout Voltage at 150mA.
Fast Enable Turn-On Time of 20μs (Typ.)
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Ultra-Low Ground Current at 65μA (Typ.)
Disable Current Less than 0.3μA (Typ.)
Thermal Protection.
Standard SOT-23-5L Packages.
Applications
USB removable devices
MPEG4 devices
Wireless LAN’s
Hand-Held Instrumentation.
Portable DVD players
Digital camera
Pin Configuration
Application Diagram
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 1
500mA CMOS LDO Voltage Regulator
(Preliminary)
SE5218
Ordering/Marking Information
Package
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
SE5218ALG-LF
SE5218BLG-LF
SE5218CLG-LF
SE5218DLG-LF
SE5218ELG-LF
SE5218FLG-LF
218Alz
218BLz
218CLz
218DLz
218ELz
218FLz
Marking Information
Starting with 5, a bar on top of 5 is
for
production
year
2001,
and
underlined 5 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:
1-26, a-z: 27-52)
A dot on top right corner is for
lead-free process.
Absolute Maximum Rating
(1)
Parameter
Input Voltage
Enable Voltage
Power Dissipation
Output Short Circuit Duration
Thermal Resistance, Junction-to-Ambient
Lead Temperature (Soldering, 5 sec.)
Junction Temperature
Storage Temperature
T
J
T
S
Θ
JA
Symbol
V
IN
V
EN
P
D
Value
6
-0.3 to V
IN
Internally Limited
(3)
Infinite
230 (SOT-23-5L)
260
+150
-40 to +150
°C/W
°C
°C
°C
Units
V
V
Operating Rating
(2)
Parameter
Supply Input Voltage
Junction Temperature
Symbol
V
IN
T
J
Value
+2.8V to +5.5
0 to +125
Units
V
°C
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 2
500mA CMOS LDO Voltage Regulator
(Preliminary)
SE5218
Electrical Characteristics
V
IN
=5V; V
EN
=V
IN
; C
IN
= 2.2μF; C
OUT
= 2.2μF（
Electrolytic
capacitor
）;
I
OUT
= 10mA; T
J
= 25°C; unless otherwise specified.
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
1.0
1.0
1.5
Max
1.530
1.836
2.550
2.856
3.060
3.366
--
--
%
--
Unit
Symbol
Parameter
V
OUT
Output Voltage
Accuracy
Conditions
SE5218 – 1.5(V
IN
=3.3V)
SE5218 – 1.8(V
IN
=3.3V)
SE5218 – 2.5
SE5218 – 2.8
SE5218 – 3.0
SE5218 – 3.3
V
IN
= (V
OUT
+1)V to 5.5V
V
IN
= (V
OUT
+0.8)V
or 2.5V
I
OUT
= 10mA to
250mA
I
OUT
= 10mA to
500mA
V
ΔV
OUT
Line Regulation
Load
Regulation
(5)
Output Voltage
Temperature
Coefficient
Dropout
Voltage
(6)
Thermal
Protection
Ripple
Rejection
Quiescent
Current
Enable Input
Threshold
Voltage
Current Limit
%/V
ΔV
OUT
ΔV
OUT
/ΔT
Note 4
I
OUT
= 10mA
I
OUT
= 150mA
I
OUT
= 250mA
I
OUT
= 400mA
Thermal Protection Temperature
Protection Hysterisys
f = 120 Hz
V
EN
= 0.4V
V
EN
= V
IN
Voltage Increasing, Output Turns On,
Logic High
Voltage Decreasing, Output Turns Off,
Logic Low
--
0.025
15
175
320
600
--
mV/°C
V
IN
– V
OUT
mV
T
PROTECTION
PSRR
I
Q
--
--
--
--
--
1.6
--
--
150
20
59
0.3
65
--
--
800
--
--
--
--
--
--
°C
dB
μA
V
TH(EN)
V
0.4
--
mA
I
LIMIT
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 3
500mA CMOS LDO Voltage Regulator
(Preliminary)
Note 1:
Exceeding the absolute maximum rating may damage the device.
Note 2:
The device is not guaranteed to function outside its operating rating.
SE5218
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
See “Thermal Consideration” section for details
the regulator will go into thermal shutdown.
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 10mA to 500mA. Changes in output voltage due to heating effects are
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
Block Diagram
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 4
500mA CMOS LDO Voltage Regulator
(Preliminary)
Line R egulation (VOUT = 3.3V)
(VIN = 4.3V to 6V, IOUT = 10mA)
SE5218
Load R egulation (VOUT = 3.3V)
(VIN = 5V, IOUT = 10mA to 500mA)
3.6000
3.600
3.500
3.400
VOUT (V)
3.5000
3.4000
VOUT (V)
3.3000
3.300
3.200
3.100
3.000
3.2000
3.1000
3.0000
4.2
4.7
5.2
VIN (V)
5.7
0
100
200
IOUT (mA)
300
400
500
Output Voltage vs Temperature
(VIN = 5V, IOUT = 10mA)
IQ vs IOUT
(VIN = 5V, IO UT = 10mA to 500mA)
3.330
3.320
3.310
VOUT (V)
160
140
120
100
3.300
3.290
3.280
IQ (uA )
80
60
40
20
3.270
0
20
40
60
Temperature (C )
80
100
120
0
0
100
200
300
IOUT (mA )
400
500
P S R R (VOUT = 3.3)
(VIN = 5V, VP P = 1V)
Transient Response (VOUT = 3.3V)
(IOUT = 10mA to 40mA)
70
60
50
P S R R (dB)
40
30
20
10
0
100
1000
10000
Frequency (Hz)
Revision
12/5/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 5
