Preliminary
RT9014/A
Ultra Low Noise 300mA Dual LDO Regulator with POR,
NMOS Driver and Requiring No Bypass Capacitor
General Description
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 (V
OUT
< 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.
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)
1 Open-Drain Driver
Ultra-low Quiescent Current 27μA/LDO
μ
High Output Accuracy 2%
Short Circuit Protection
Thermal Shutdown Protection
Current Limit Protection
Short Circuit Thermal Folded Back Protection
Tiny 10-Lead WDFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9014/A-
Package Type
QW : WDFN-10L 3x3 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial 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, PJ : 3.00V/2.50V
PP : 3.00V/3.00V, CS : 1.2V/3.3V
EN Function Independent
EN Function Dependent
Note :
Richtek Pb-free and Green products are :
1
2
3
4
5
11
10
9
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances
Pin Configurations
(TOP VIEW)
VIN
EN
NC
SW
SET
1
2
3
4
5
11
10
9
GND
RT9014
WDFN-10L 3x3
DS9014/A-08 August 2007
RT9014A
9
VOUT1
VOUT2
8
POR
7
DRV
GND
9
VIN
EN1
EN2
SW
SET
GND
VOUT1
VOUT2
8
POR
7
DRV
GND
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
www.richtek.com
1
RT9014/A
Typical Application Circuit
100K
Preliminary
100K
V
IN
VIN
C
IN
1uF Chip Enable
EN
POR
DRV
RT9014
VOUT1
V
IN
VIN
C
IN
1uF
Chip Enable
EN1
POR
DRV Enable
SW
100k
SET
C
OUT1
1uF
C
OUT2
1uF
V
OUT1
DRV Enable
100k
DRV
RT9014A
EN2
VOUT1
SW
C
OUT1
1uF
C
OUT2
1uF
V
OUT1
VOUT2
GND
V
OUT2
SET
GND
C
DELAY
VOUT2
V
OUT2
C
DELAY
Functional Pin Description
Pin No.
RT9014-□□PQW
1
2
--
--
3
RT9014A-□□
1
--
2
3
--
Pin
Name
VIN
EN
EN1
EN2
NC
Pin Function
Supply Input.
Chip Enable (Active High).
Chip Enable 1 (Active High).
Chip Enable 2 (Active High).
No Internal Connection Pin.
Active high signal drives open-drain N-MOSFET.
4
4
SW
Note that this pin is high impedance. There should be a pull low
100kΩ resistor connected to GND when the control signal is
floating.
Delay Set Input: Connect external capacitor to GND to set the
5
6
7
8
9
10
5
6
7
8
9
10
SET
GND
DRV
POR
internal delay for the POR output. When left open, there is no
delay. This pin cannot be grounded.
Common Ground.
Open-Drain Output: Capable of sinking 150mA.
Power-On Reset Output: Open-drain output. Active low indicates
an output under-voltage condition on regulator 2.
VOUT2 Channel 2 Output Voltage
VOUT1 Channel 1 Output Voltage
The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Exposed Pad (11) Exposed Pad (11) GND
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.
www.richtek.com
2
DS9014/A-08 August 2007
Preliminary
Absolute Maximum Ratings
(Note 1)
RT9014/A
6V
6V
0.926W
108°C/W
260°C
Supply Input Voltage ------------------------------------------------------------------------------------------------------
Other I/O Pin Voltages ---------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
WDFN-10L
3x3 -------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 4)
WDFN-10L 3x3,
θ
JA
-------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------
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 ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------
−
40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- 0°C to 85°C
Electrical Characteristics
(V
IN
= V
OUT
+ 1V, V
EN
= V
IN
, C
IN
= C
OUT
= 1μF, T
A
= 25°C, unless otherwise specified.)
Parameter
Input Voltage
Dropout Voltage
(Note 5)
Symbol
V
IN
V
DROP
V
OUT
ΔV
ΔV
LINE
Test Conditions
V
IN
= 2.5V to 5.5V
I
OUT
= 150mA
I
OUT
= 300mA
Min
2.5
--
--
1.2
Typ
--
120
240
--
--
--
--
450
58
--
--
--
100
170
40
Max
5.5
--
--
3.6
+2
0.2
0.6
700
80
1
--
0.4
--
--
--
Units
V
mV
mV
V
%
%/V
%
mA
uA
uA
V
ppm/°C
°C
°C
Output voltage range
V
OUT
Accuracy
Line Regulation
Load Regulation
Current Limit
Quiescent Current
Shutdown Current
EN Threshold
Output Voltage TC
Thermal Shutdown
Thermal Shutdown Hysteresis
I
OUT
= 1mA
V
IN
= (V
OUT
+ 0.3V) to 5.5V or
V
IN
> 2.5V, whichever is larger
-2
--
--
330
--
--
1.5
--
--
ΔV
LOAD
1mA < I
OUT
< 300mA
R
LOAD
= 1Ω
I
Q
I
Q_SD
V
IH
V
IL
T
SD
ΔT
SD
V
EN
> 1.5V
V
EN
< 0.4V
V
IN
= 2.5V to 5.5V, Power On
V
IN
= 2.5V to 5.5V, Shutdown
--
--
To be continued
DS9014/A-08 August 2007
www.richtek.com
5
Microcontroller MCU
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