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
SEAWARD [ Seaward Electronics Inc. ]
