Preliminary |
RT9014/A |
Ultra Low Noise 300mA Dual LDO Regulator with POR, NMOS Driver and Requiring No Bypass Capacitor
General Description |
Features |
RT9014/A is a dual channel, low noise, and low dropout with the sourcing ability up to 300mA, an open drain driver and power-on reset function. The open-drain output is capable of sinking 150mA for LED backlighting applications.
The range of output voltage is from 1.2V to 3.6V by operating from 2.5V to 5.5V input.
RT9014/A 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.
RT9014/A is short circuit thermal folded back protected. RT9014/A 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.
RT9014/A can operate stably with very small ceramic output capacitors, reducing required board space and component cost. RT9014/A is available in fixed output voltages in the WDFN-10L 3x3 package.
Ordering Information
RT9014/A-
Package Type
QW : WDFN-10L 3x3 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
Output Voltage : VOUT1/VOUT2 FM : 1.50V/2.80V, FP : 1.50V/3.00V GK : 1.80V/2.60V, GM : 1.80V/2.80V GP : 1.80V/3.00V, JG : 2.50V/1.80V JM : 2.50V/2.80V, JP : 2.50V/3.00V JN : 2.50V/2.85V, PP : 3.00V/3.00V
zWide Operating Voltage Ranges : 2.5V to 5.5V
zLow-Noise for RF Application
zNo Noise Bypass Capacitor Required
zFast Response in Line/Load Transient
zTTL-Logic-Controlled Shutdown Input
zLow Temperature Coefficient
zDual LDO Outputs (300mA/300mA)
z1 Open-Drain Driver
zUltra-low Quiescent Current 27μA/LDO
zHigh Output Accuracy 2%
zShort Circuit Protection
zThermal Shutdown Protection
zCurrent Limit Protection
zShort Circuit Thermal Folded Back Protection
zTiny 10-Lead WDFN Package
zRoHS Compliant and 100% Lead (Pb)-Free
Applications
zCDMA/GSM Cellular Handsets
zBattery-Powered Equipment
zLaptop, Palmtops, Notebook Computers
zHand-Held Instruments
zPCMCIA Cards
zPortable Information Appliances
Pin Configurations
(TOP VIEW)
VIN |
1 |
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10 |
VOUT1 |
VIN |
1 |
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10 |
VOUT1 |
EN |
2 |
GND |
9 |
VOUT2 |
EN1 |
2 |
GND |
9 |
VOUT2 |
NC 3 |
8 |
POR |
EN2 3 |
8 |
POR |
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SW 4 |
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7 |
DRV |
SW 4 |
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7 |
DRV |
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SET |
5 |
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9 |
GND |
SET |
5 |
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9 |
GND |
EN Function Independent
EN Function Dependent
Note :
RichTek Pb-free 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. `100% matte tin (Sn) plating.
RT9014 |
RT9014A |
WDFN-10L 3x3
Marking Information
For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail.
DS9014/A-02 May 2006 |
www.richtek.com |
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RT9014/A |
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Preliminary |
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Typical Application Circuit |
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100K |
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100K |
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VIN |
VIN |
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POR |
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V |
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VIN |
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POR |
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CIN |
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IN |
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C |
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1uF Chip Enable |
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IN |
Chip Enable EN1 |
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DRV |
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1uF |
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DRV |
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EN |
RT9014 |
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RT9014A |
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VOUT1 |
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VOUT1 |
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EN2 |
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V |
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DRV Enable |
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COUT1 |
DRV Enable |
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VOUT1 |
C |
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OUT1 |
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SW |
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1uF |
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SW |
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OUT1 |
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1uF |
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100k |
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SET |
VOUT2 |
C |
VOUT2 |
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100k |
SET |
VOUT2 |
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V |
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GND |
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COUT2 |
OUT2 |
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OUT2 |
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GND |
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CDELAY |
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1uF |
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CDELAY |
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1uF |
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Functional Pin Description
Pin No. |
Pin |
Pin Function |
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RT9014-□□PQW |
RT9014A-□□PQW |
Name |
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1 |
1 |
VIN |
Supply Input |
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2 |
-- |
EN |
Chip Enable (Active High) |
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-- |
2 |
EN1 |
Chip Enable 1 (Active High) |
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-- |
3 |
EN2 |
Chip Enable 2 (Active High) |
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3 |
-- |
NC |
No Internal Connection Pin. |
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Active high signal drives open-drain N-Channel MOSFET. |
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4 |
4 |
SW |
Note that this pin is high impedance. There should be a pull low |
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100kΩ resistor connected to GND when the control signal is |
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floating. |
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Delay Set Input: Connect external capacitor to GND to set the |
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5 |
5 |
SET |
internal delay for the POR output. When left open, there is no |
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delay. This pin cannot be grounded. |
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6 |
6 |
GND |
Common Ground |
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7 |
7 |
DRV |
Open-Drain Output: Capable of sinking 150mA. |
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8 |
8 |
POR |
Power-On Reset Output: Open-drain output. Active low indicates |
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an output under-voltage condition on regulator 2. |
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9 |
9 |
VOUT2 |
Channel 2 Output Voltage |
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10 |
10 |
VOUT1 |
Channel 1 Output Voltage |
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Exposed Pad |
Exposed Pad |
GND |
Exposed pad should be soldered to PCB board and connected to |
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GND. |
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www.richtek.com |
DS9014/A-02 May 2006 |
2
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Preliminary |
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RT9014/A |
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Available Voltage Version |
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Voltage |
C |
F |
W |
G |
D |
Y |
H |
E |
J |
K |
T |
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Code |
1.2 |
1.5 |
1.6 |
1.8 |
1.85 |
1.9 |
2 |
2.1 |
2.5 |
2.6 |
2.65 |
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Voltage |
L |
M |
N |
V |
P |
Q |
R |
S |
-- |
-- |
-- |
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Code |
2.7 |
2.8 |
2.85 |
2.9 |
3 |
3.1 |
3.2 |
3.3 |
-- |
-- |
-- |
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Function Block Diagram
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Shutdown |
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VIN |
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and |
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Logic Control |
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VREF |
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- |
MOS Driver |
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+ |
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Error |
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VOUT1 |
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Amplifier |
Current-Limit |
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and |
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Thermal |
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Protection |
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GND |
EN |
Shutdown |
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and |
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Logic Control |
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VREF |
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- |
MOS Driver |
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+ |
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Error |
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VOUT2 |
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Amplifier |
Current-Limit |
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and |
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Thermal |
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Protection |
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GND |
SET |
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POR& Delay |
POR |
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DRV |
SW |
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SW Logic |
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RT9014 |
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To be continued
DS9014/A-02 May 2006 |
www.richtek.com |
3
RT9014/A |
Preliminary |
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EN1 |
Shutdown |
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VIN |
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and |
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Logic Control |
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VREF |
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- |
MOS Driver |
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+ |
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Error |
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VOUT1 |
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Amplifier |
Current-Limit |
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and |
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Thermal |
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Protection |
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GND |
EN2 |
Shutdown |
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and |
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Logic Control |
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VREF |
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- |
MOS Driver |
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+ |
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Error |
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VOUT2 |
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Amplifier |
Current-Limit |
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and |
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Thermal |
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Protection |
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GND |
SET |
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POR& Delay |
POR |
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DRV |
SW |
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SW Logic |
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RT9014A |
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www.richtek.com |
DS9014/A-02 May 2006 |
4