300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Description
The SE5509B series of fixed output low
dropout linear regulators are designed for portable
battery powered applications, which require low
power consumption, low noise environment, 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 SE5509B has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0μF. The output voltages
range from 1.3V to 4.4V in 100mV increments.
Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0,
and 3.3V. The SE5509B is characterized for
operation
from
-40
o
C
to
125
o
C,
junction
temperarure.
SE5509B
Features
Typical 110mV Dropout Voltage at 150mA.
Fast Enable Turn-On Time of 20μs (Typ.)
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 3%.
Ultra-Low Ground Current at 35μA (Typ.)
Disable Current Less than 0.01μA (Typ.)
Over Current and thermal Protection.
No Reverse Current.
ESD rating is 2.5KV(HBM).
Standard SOT-23-5L and TSOP-5 Package.
100% Lead (Pb)-Free
Application
USB removable devices
MPEG4 devices
Wireless LAN’s
Hand-Held Instrumentation.
Portable DVD players
Digital camera
Pin Configuration
Ordering Information
SE5509B
_
__
Pin (1=>5):
G: V
IN
/GND/EN/BYPASS/V
OUT
Package:
L: SOT-23-5L / TSOP-5
Output Voltage: A: V
OUT
= 3.3V
B: V
OUT
= 2.8V
C: V
OUT
= 2.5V
D: V
OUT
= 1.8V
E: V
OUT
= 1.5V
F: V
OUT
= 3.0V
Block Diagram
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 1
300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Ordering/Marking Information
Package
SOT-23-5L / TSOP-5
(Top View)
VIN
GND
ENABLE
1
2
3
4
BYPASS
5
VOUT
SE5509B
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
SE5509BALG-LF
SE5509BBLG-LF
SE5509BCLG-LF
SE5509BDLG-LF
SE5509BELG-LF
SE5509BFLG-LF
509ALz
509BLz
509CLz
509DLz
509ELz
509FLz
Marking Information
The last character is the batch number.
A dot on top right corner is for lead-free
process.
LF: lead free.
Absolute Maximum Rating
(1)
Parameter
Input Voltage
Enable Voltage
Output 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
V
OUT
P
D
Value
6
-0.3 to V
IN
-0.3 to 4.6
Internally Limited
(3)
Infinite
230
260
0 to +150
-40 to +150
°C/W
°C
°C
°C
Units
V
V
V
Operating Rating
(2)
Parameter
Supply Input Voltage Range
Junction Temperature Range
Symbol
V
IN
T
J
Value
5.5
0 to +125
Units
V
°C
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 noted
Conditions
Min
1.455
1.746
2.425
2.716
2.910
3.201
--
Typ
1.5
1.8
2.5
2.8
3.0
3.3
0.2
Max
1.545
1.854
2.575
2.884
3.090
3.399
--
Unit
Symbol
Parameter
V
OUT
Output Voltage
Accuracy
SE5509B – 1.5 (V
IN
=1.8V)
SE5509B – 1.8 (V
IN
=3.3V)
SE5509B – 2.5
SE5509B– 2.8
SE5509B – 3.0
SE5509B – 3.3
V
IN
= (V
OUT
+ 0.8)V to 5.5V
V
ΔV
OUT
Line Regulation
%/V
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 2
300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Electrical Characteristics (Continued)
V
IN
= 5V; C
IN
= 2.2μF; C
OUT
= 2.2μF（
Electrolytic
SE5509B
capacitor
）;
I
OUT
= 10mA; T
J
= 25°C; unless otherwise noted
Conditions
Min
--
Typ
2.0
Max
--
Unit
%
Symbol
ΔV
OUT
Parameter
Load Regulation
(5)
Vout version>2.8V
V
IN
= (V
OUT
+ 0.8)V or 2.5V
I
OUT
= 10mA to 300mA
Vout version≤2.8V
V
IN
= (V
OUT
+ 0.8)V or 2.5V
I
OUT
= 10mA to 300mA
Note 4
ΔV
OUT
Load Regulation
Output Voltage
(5)
--
3.0
--
%
ΔV
OUT
/ΔT
Temperature
Coefficient
Dropout Voltage
(6)
(V
OUT
>3.0V)
--
0.1
--
mV/°C
I
OUT
= 10mA
I
OUT
= 150mA
I
OUT
= 300mA
Thermal Protection Temperature
Protection Hysterisys
10Hz to 100kHz,
I
OUT
=200mA,C
OUT
=2.2μF
C
bypass
=0.1μF
f =10kHz,I
OUT
=50mA,C
bypass
=0.1μF
V
EN
= 0.4V
V
EN
= V
IN
Voltage Raising, Output Turns On, Logic High
Voltage Falling, Output Turns Off, Logic Low
--
--
--
--
--
8
110
250
150
20
--
--
--
--
--
°C
mV
V
IN
– V
OUT
T
PROTECTION
Thermal Protection
e
NO
PSRR
I
Q
Output Noise
Voltage
Ripple Rejection
Quiescent Current
Enable Input
Threshold Voltage
Current Limit
--
100
--
μV
RMS
dB
μA
--
--
--
1.6
--
--
70
0.01
35
--
--
600
--
--
--
--
0.4
--
V
TH(EN)
I
LIMIT
V
mA
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 300mA. 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 100mV below its
nominal value measured at 0.8V differential.
Note 7:
The Cin or Cout should be chosen carefully. Please refer to the Application Hints
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 3
300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Line Regulation (Iout=10mA)
3.40
3.35
Vout (V)
SE5509B
Load Regulation (Vin=4.3V)
3.40
3.35
Vout (V)
3.30
3.25
3.20
3.15
3.30
3.25
3.20
3.15
3.60
4.00
4.40
4.80
Vin (V)
5.20
5.60
6.00
0
100
200
Iout (mA)
300
400
IQ VS. VIN (VOUT=3.3V)
32
32
31
Iq (uA)
31
30
30
29
29
4.00
4.50
5.00
Vin (V)
5.50
6.00
Iq (uA)
50
45
40
35
30
25
20
0
IQ VS. IOUT (VOUT=3.3V)
100
200
Iout (mA)
300
400
PSRR
(V
IN
=V
OUT
+1V+0.5V
p-pAC
，I
OUT
=50mA，C
BY
=0.1uF)
80
70
60
PSRR (dB)
50
40
30
20
10
0
0.1
1
Frequency (kHz)
10
100
Revision 5/4/2009
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2006. • www.seawardinc.com.cn • Page 4
300mA Low Power Low Noise
LDO CMOS Voltage Regulator
Application Hints
Like any low dropout regulator, SE5509B requires
external capacitors to ensure stability.
ensure performance.
The
external capacitors must be carefully selected to
SE5509B
Thermal Considerations
It is important that the thermal limit of the package is
not exceeded. The SE5509B has built-in thermal
protection.
to ground.
When the thermal limit is exceeded,
The power dissipation for a given
the IC will enter protection, and V
OUT
will be pulled
application can be calculated as following:
The power dissipation (P
D
) is
P
D
= I
OUT
* [V
IN
– V
OUT
]
The thermal limit of the package is then limited to
P
D(MAX)
= [T
J
– T
A
]/Θ
JA
where T
J
is the junction
temperature, TA is the ambient temperature, and
Θ
JA
is around 230°C/W for SE5509B. SE5509B is
designed to enter thermal protection at 150°C. For
example, if T
A
is 25°C then the maximum P
D
is
limited to about 0.6W. In other words, if I
OUT(MAX)
=
300mA, then [V
IN
– V
OUT
] cannot exceed 2V.
Input Capacitor
An input capacitor of at least 1μF is required. The
inexpensive Electrolytic capacitor is preferred. The
value can be increased without upper limit.
Output Capacitor
An output capacitor is required for stability. It must
be placed no more than 1 cm away from the V
OUT
pin, and connected directly between V
OUT
and GND
pins. The inexpensive Electrolytic capacitor is
recommended. The minimum value is 1μF but may
be increased without limit.
Application Diagram
Revision 5/4/2009
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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