LDO Regulator. RP1228 Datasheet

RP1228 Regulator. Datasheet pdf. Equivalent

RP1228 Datasheet
Recommendation RP1228 Datasheet
Part RP1228
Description Portable Power Management 300mA Dual LDO Regulator
Feature RP1228; Preliminary RP1228 Portable Power Management 300mA Dual LDO Regulator General Description The RP1.
Manufacture RichPower
Datasheet
Download RP1228 Datasheet




RichPower RP1228
Preliminary
RP1228
Portable Power Management 300mA Dual LDO Regulator
General Description
The RP1228 is a dual channel, low noise, and low dropout
regulator sourcing up to 300mA at each channel. The range
of output voltage is from 1.2V to 3.6V by operating from
2.5V to 5.5V input.
The RP1228 offers 2% accuracy, extremely low dropout
voltage (240mV @ 300mA), and extremely low ground
current, only 27µA per LDO. The shutdown current is near
zero current which is suitable for battery-power devices.
Other features include current limiting, over temperature,
output short circuit protection.
The RP1228 is short circuit thermal folded back protected.
The IC lowers its OTP trip point from 165°C to 110°C when
output short circuit occurs (VOUT < 0.4V) providing
maximum safety to end users.
The RP1228 can operate stably with very small ceramic
output capacitors, reducing required board space and
component cost. The RP1228 is available in fixed output
voltages in the SOT-23-6 package.
Ordering Information
Features
Wide Operating Voltage Ranges : 2.5V to 5.5V
Low-Noise for RF Application
No Noise Bypass Capacitor Required
Fast Response in Line/Load Transient
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Dual LDO Outputs (300mA/300mA)
Ultra-low Quiescent Current 27µA/LDO
High Output Accuracy 2%
Short Circuit Protection
Thermal Shutdown Protection
Current Limit Protection
Short Circuit Thermal Folded Back Protection
RoHS Compliant and 100% Lead (Pb)-Free
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances
RP1228-
Package Type
E: SOT-23-6
Operating Temperature Range
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage: VOUT1/VOUT2
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.
Marking Information
For marking information, contact our sales representative
directly or through a Richpower distributor located in your
area.
Available Voltage Version
VOUT1/VOUT2
Code
FM
MF
GM
VOUT1/VOUT2
Voltage(V)
1.5V/2.8V
2.8V/1.5V
1.8V/2.8V
Note: For other specific voltage version, please contact our
sales representative.
RP1228-07P Dec 2009
1



RichPower RP1228
RP1228
Pin Configurations
Typical Application Circuit
Preliminary
(TOP VIEW)
VOUT1 GND VOUT2
65 4
23
EN1 VIN EN2
SOT-23-6
VIN
CIN
1µF
VIN
VOUT1
RP1228
COUT1
2.2µF
VOUT1
Chip Enable
EN1
VOUT2
EN2
GND
COUT2
2.2µF
VOUT2
Functional Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
EN1
VIN
EN2
VOUT2
GND
VOUT1
Pin Function
Chip Enable1 (Active High).
Supply Input.
Chip Enable2 (Active High).
Channel 2 Output Voltage.
Common Ground. The exposed pad must be soldered to a large
PCB and connected to GND for maximum power dissipation.
Channel 1 Output Voltage.
2 RP1228-07P Dec 2009



RichPower RP1228
Function Block Diagram
Preliminary
EN1
0.2µA
VREF
Shutdown
and
Logic Control
+
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
EN2
0.2µA
VREF
Shutdown
and
Logic Control
+
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
RP1228
VIN
VOUT1
GND
VOUT2
GND
RP1228-07P Dec 2009
3







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