Richtek RT9014A-CSPQW, RT9014A-FMPQW, RT9014A-FPPQW, RT9014A-GKPQW, RT9014A-GPPQW Schematic [ru]
...
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
< 0.4V) providing
OUT
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-
Note :
RichTek Pb-free products are :
`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.
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
EN Function Independent
EN Function Dependent
Features
zz
Wide Operating Voltage Ranges : 2.5V to 5.5V
z
zz
zz
z Low-Noise for RF Application
zz
z No Noise Bypass Capa citor Required
zz
z Fast Response in Line/Load Transient
zz
zz
z TTL-Logic-Controlled Shutdown Input
zz
zz
z Low Temperature Coefficient
zz
zz
z Dual LDO Outputs (300mA/300mA)
zz
zz
z 1 Open-Drain Driver
zz
zz
z Ultra-low Quiescent Current 27
zz
zz
z High Output Accuracy 2%
zz
zz
z Short Circuit Protection
zz
zz
z Thermal Shutdown Protection
zz
zz
z Current Limit Protection
zz
zz
z Short Circuit Thermal Folded Back Protection
zz
zz
z Tiny 10-Lead WDFN Package
zz
zz
z RoHS Compliant and 100% Lead (Pb)-Free
zz
μμ
μA/LDO
μμ
Applications
zz
z CDMA/GSM Cellular Handsets
zz
zz
z Battery-Powered Equipment
zz
zz
z Laptop, Palmtops, Notebook Computers
zz
zz
z Hand-Held Instruments
zz
zz
z PCMCIA Cards
zz
zz
z Portable Information Appliances
zz
Pin Configurations
(TOP VIEW)
VIN
EN
NC
SW
SET
1
2
GND
3
4
5
10
9
8
7
9
VOUT1
VOUT2
POR
DRV
GND
VIN
EN1
EN2
SW
SET
1
2
3
4
5
RT9014 RT9014A
WDFN-10L 3x3
GND
10
9
8
7
9
VOUT1
VOUT2
POR
DRV
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.
DS9014/A-02 May 2006 www.richtek.com
1
RT9014/A
Typical Application Circuit
Preliminary
100K
V
IN
DRV Enable
C
1uF
IN
Chip Enable
100k
C
DELAY
VIN
EN
SW
SET
RT9014
GND
POR
DRV
VOUT1
VOUT2
Functional Pin Description
Pin No.
RT9014-□□PQW RT9014A-□□PQW
1 1 VIN Supply Input
2 -- EN Chip Enable (Active High)
-- 2 EN1 Chip Enable 1 (Active High)
-- 3 EN2 Chip Enable 2 (Active High)
C
OUT1
1uF
C
OUT2
1uF
Pin
Name
V
OUT1
V
OUT2
Pin Function
V
IN
DRV Enable
C
1uF
IN
Chip Enable
100k
C
DELAY
VIN
EN1
EN2
SW
SET
100K
RT9014A
GND
POR
DRV
VOUT1
VOUT2
C
1uF
C
1uF
OUT1
OUT2
V
V
OUT1
OUT2
3 -- NC
No Internal Connection Pin.
Active high signal drives open-drain N-Channel 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 5 SET
internal delay for the POR output. When left open, there is no
delay. This pin cannot be grounded.
6 6 GND Common Ground
7 7 DRV
Open-Drain Output: Capable of sinking 150mA.
Power-On Reset Output: Open-drain output. Active low indicates
8 8 POR
an output under-voltage condition on regulator 2.
9 9 VOUT2 Channel 2 Output Voltage
10 10 VOUT1 Channel 1 Output Voltage
Exposed pad should be soldered to PCB board and connected to
Exposed Pad Exposed Pad GND
GND.
DS9014/A-02 May 2006www.richtek.com
2
Available Voltage Version
Preliminary
RT9014/A
Voltage
Code
Voltage
Code
C F W G D Y H E J K T
1.2 1.5 1.6 1.8 1.85 1.9 2 2.1 2.5 2.6 2.65
L M N V P Q R S -- -- --
2.7 2.8 2.85 2.9 3 3.1 3.2 3.3 -- -- --
Function Block Diagram
V
REF
Shutdown
and
Logic Control
-
+
Error
Amplifier
VIN
MOS Driver
VOUT1
Current-Limit
and
Thermal
Protection
EN
SET
SW
RT9014
V
REF
Shutdown
and
Logic Control
-
+
Error
Amplifier
MOS Driver
Current-Limit
Thermal
Protection
POR& Delay
SW Logic
GND
VOUT2
and
GND
POR
DRV
To be continued
DS9014/A-02 May 2006 www.richtek.com
3
RT9014/A
Preliminary
EN1
EN2
V
V
REF
REF
Shutdown
and
Logic Control
-
+
Error
Amplifier
Shutdown
and
Logic Control
-
+
Error
Amplifier
VIN
MOS Driver
VOUT1
Current-Limit
and
Thermal
Protection
GND
MOS Driver
VOUT2
Current-Limit
and
Thermal
Protection
SET
SW
RT9014A
POR& Delay
SW Logic
GND
POR
DRV
DS9014/A-02 May 2006www.richtek.com
4
Loading...