LDO Regulator. RP1227 Datasheet

RP1227 Regulator. Datasheet pdf. Equivalent

RP1227 Datasheet
Recommendation RP1227 Datasheet
Part RP1227
Description 300mA LDO Regulator
Feature RP1227; Preliminary RP1227 Adjustable, 300mA LDO Regulator with Enable General Description The RP1227 is .
Manufacture RichPower
Datasheet
Download RP1227 Datasheet





RichPower RP1227
Preliminary
RP1227
Adjustable, 300mA LDO Regulator with Enable
General Description
The RP1227 is a high performance linear voltage regulator
with enable high function and adjustable output with a
1.175V reference voltage. It operates from an input of 3V
to 5.5V and provides output current up to 300mA with two
external resistors to set the output voltage ranges from
1.175V to 4.5V.
The RP1227 has superior regulation over variations in line
and load. Also it provides fast respond to step changes in
load. Other features include over-current and over-
temperature protection. The device has enable pin to reduce
power consumption in shutdown mode.
The devices is available in the popular SOT-23-5 package.
Ordering Information
RP1227
Package Type
B : SOT-23-5
Operating Temperature Range
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richpower Green products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
300mV Dropout @ 300mA
150µA Low Ground Pin Current
Excellent Line and Load Regulation
<1µA Standby Current in Shutdown Mode
Guaranteed 300mA Output Current
Stable with 1µF Input and Output Ceramic Capacitor
Adjustable Output Voltage Ranges from 1.175V to
4.5V
Over-Temperature/Over-Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Battery-Powered Equipment
Graphic Card
Peripheral Cards
PCMCIA Card
Marking Information
For marking information, contact our sales representative
directly or through a Richpower distributor located in your
area.
Pin Configurations
(TOP VIEW)
VOUT ADJ
54
23
VIN GND EN
SOT-23-5
RP1227-00P Aug 2009
1



RichPower RP1227
RP1227
Preliminary
Typical Application Circuit
VIN
Chip Enable
C3
0.1µF
RP1227
VIN VOUT
EN
C1
1µF
GND ADJ
VOUT
R1
C2
1µF
R2
VOUT = 1.175 x (
1+ R1
R2
) Volts
Adjustable Operation
Note: The external feedback resistors are in hundreds of OHM to hundreds of kOHM ranges.
Functional Pin Description
Pin No. Pin Name
Pin Function
1 VIN
2 GND
3 EN
4 ADJ
Power Input Voltage
Ground
Chip Enable (Active High)
Adjust Output Voltage. The output voltage is set by the internal feedback resistors when
this pin grounded. If external feedback resistors are applied, the output voltage will be:
VOUT = 1.175 × (1 +
R1 ) Volts
R2
5 VOUT Output Voltage
Function Block Diagram
Shutdown
EN and
Logic Control
Current-Limit
and
Thermal Protection
1.175V
VREF
+_
Error
Amplifier
MOS
Driver
Thermal
SHDN
VIN
VOUT
ADJ
GND
2 RP1227-00P Aug 2009



RichPower RP1227
Preliminary
RP1227
Absolute Maximum Ratings (Note 1)
Supply Input Voltage -------------------------------------------------------------------------------------------------- 6V
Power Dissipation, PD @ TA = 25°C
SOT-23-5 ---------------------------------------------------------------------------------------------------------------- 0.4W
Package Thermal Resistance (Note 7)
SOT-23-5, θJA ----------------------------------------------------------------------------------------------------------- 250°C/W
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range ---------------------------------------------------------------------------------------- 65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
Supply Input Voltage -------------------------------------------------------------------------------------------------- 3V to 5.5V
Enable Input Voltage -------------------------------------------------------------------------------------------------- 0V to 5.5V
Junction Temperature Range ---------------------------------------------------------------------------------------- 40°Cto 125°C
Electrical Characteristics
(VIN = VOUT + 0.7V, IOUT = 10µA, CIN = COUT = 1µF (Ceramic), TA = 25° C unless otherwise specified)
Parameter
Reference Voltage Tolerance
Adjust Pin Current
Output Voltage Range
Quiescent Current (Note 5)
Standby Current (Note 6)
Current Limit
Dropout Voltage (Note 4)
Line Regulation
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
EN Threshold
Logic-Low Voltage
Logic-High Voltage
EN Current
Symbol
Test Conditions
VREF
IADJ
VOUT
IQ
Enabled, IOUT = 0mA
ISTBY
ILIM
VDROP
VLINE
TSD
TSD
VIN = 5.5V, Shutdown
IOUT = 10mA
IOUT = 300mA
VOUT + 0.7V < VIN < 5.5V
VIL VIN = 3.3V, Shutdown
VIH VIN = 3.3V, Enable
IEN VIN = 5.5V, Enable
Min
1.163
--
1.175
--
--
0.5
--
--
--
--
--
--
2.0
--
Typ
1.175
--
--
150
--
--
10
300
0.001
170
40
--
--
--
Max
1.187
10
4.5
--
1
--
--
-
--
--
--
0.4
--
10
Units
V
nA
V
µA
µA
A
mV
%/V
°C
°C
V
nA
RP1227-00P Aug 2009
3





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