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
Preliminary
RT9014/A
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6V
z Other I/O Pin Voltages --------------------------------------------------------------------------------------------------- 6V
z Power Dissipation, P
@ T
D
= 25°C
A
WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------------- 0.926W
z Package Thermal Resistance (Note 4)
WDFN-10L 3x3, θJA------------------------------------------------------------------------------------------------------- 108°C/W
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 3)
z Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
z Enable Input Voltage------------------------------------------------------------------------------------------------------ 0V to 5.5V
z Operation Junction Temperature Range ------------------------------------------------------------------------------ −40°C to 125°C
z Operation Ambient Temperature Range ------------------------------------------------------------------------------ 0°C to 85°C
Electrical Characteristics
(V
= V
IN
Input Voltage
Dropout Voltage (Note 5)
Output voltage range
V
OUT
Line Regulation
Load Regulation
Current Limit
Quiescent Current
Shutdown Current
EN Threshold
Output Voltage TC -- 100 --
OUT
+ 1V, V
= VIN, C
EN
= C
IN
= 1μF, TA = 25°C, unless otherwise specified.)
OUT
Parameter Symbol Test Conditions Min Typ Max Units
2.5 -- 5.5 V
-- 120 -- mV
-- 240 -- mV
-2 -- +2 %
-- -- 0.2 %/V
-- -- 0.6
330 450 700 mA
-- 58 80 uA
-- -- 1 uA
1.5 -- --
-- -- 0.4
Accuracy
V
V
IN
V
DROP
V
OUT
ΔV
ΔV
LINE
ΔV
LOAD
VEN > 1.5V
I
Q
VEN < 0.4V
I
Q_SD
VIH V
V
V
IL
= 2.5V to 5.5V
IN
I
= 150mA
OUT
= 300mA
I
OUT
1.2 -- 3.6 V
I
= 1mA
OUT
= (V
V
IN
V
> 2.5V, whichever is larger
IN
1mA < I
R
LOAD
= 2.5V to 5.5V, Power On
IN
= 2.5V to 5.5V, Shutdown
IN
OUT
OUT
= 1Ω
+ 0.3V) to 5.5V or
< 300mA
%
V
ppm/°C
Thermal Shutdown
Thermal Shutdown Hysteresis
T
ΔT
SD
-- 170 --
-- 40 --
SD
°C
°C
To be continued
DS9014/A-02 May 2006 www.richtek.com
5
RT9014/A
Parameter Symbol Test Conditions Min Typ Max Units
PSRR
= 10mA
I
LOAD
PSRR
I
= 150mA
LOAD
Power Good
PSRR
PSRR
Preliminary
f =100Hz -- 65 -- dB
f =1kHz -- 60 -- dB
f =10kHz -- 50 -- dB
f =100Hz -- 65 -- dB
f =1kHz -- 50 -- dB
f =10kHz -- 50 -- dB
Reset Threshold
POR Output Logic Low Voltage
POR Leakage Current
Set pin current source
V
THL
V
THH
V
I
OL
I
POR
Low Threshold, % of nominal
(Flag On)
V
OUT2
High Threshold, % of nominal
(Flag Off)
V
OUT2
= 250uA
LOW
Flag Off -1 0.01 1
V
= 0
SET
90 -- -- %
-- -- 96 %
-- 0.02 0.1 V
μA
0.60 1.25 1.70
μA
Set pin threshold POR = high -- 1.4 -- V
DRV output
Voltage Low
Leakage current
SW input current
I
= 150mA
DRV
I
= 0mA, V
DRV
V
< 0.6V(DRV Shutdown)
IL
> 2.5V(DRV Enable)
V
IH
= 5V, SW = 0V
DRV
-- 0.2 0.5 V
-1 0.01 1
-1 0.01 1
-1 0.01 1
μA
μA
μA
VIL Logic Low -- -- 0.4 V
SW input voltage
Logic High 1.5 -- -- V
V
IH
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θ
Note 5. The dropout voltage is defined as V
is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JA
JEDEC 51-3 thermal measurement standard.
-V
IN
, which is measured when V
OUT
OUT
is V
OUT(NORMAL)
− 100mV.
DS9014/A-02 May 2006www.richtek.com
6
Preliminary
Typical Operating Characteristics
RT9014/A
Output Voltage vs. Temperature
1.9
RT9014/A-GS, V
1.85
1.8
Output Voltage (V)
1.75
1.7
-50 -25 0 25 50 75 100 125
OUT1
Temperature
(°C)
Quiescent Current vs. Temperature
70
RT9014/A-GS
VIN = V
CIN = C
65
60
55
Quiescent Current (uA)
EN
OUT1
= V
= C
SW
OUT2
= 4.3V
= 1uF/X7R
Output Voltage vs. Temperature
3.4
RT9014-GS, V
3.35
3.3
3.25
Output Voltage (V)
3.2
-50 -25 0 25 50 75 100 125
OUT2
Temperature
(°C)
Dropout Voltage vs. Loa d Current
350
RT9014/A-GS, V
300
250
200
150
100
Dropout Voltage (mV)
50
OUT2
TJ = 25°C
TJ = 125°C
TJ = -40°C
50
-50 -25 0 25 50 75 100 125
Temperature
(°C)
PSRR
20
RT9014-FM, V
VIN = 4.3V ± 0.1V
0
CIN = C
-20
-40
PSRR (dB)
-60
-80
0.01 0.1 1 10k 100k 1000k
10 100 1000 10000 100000 1000000
OUT1
OUT1
= C
= 1uF/X7R
OUT2
Frequency (Hz)
(Hz)
I
LOAD
I
= 100mA
LOAD
= 50mA
I
LOAD
= 10mA
0
0 50 100 150 200 250 300
Load Current (mA)
POR Dela y
10000
POR Delay Time (ms)
RT9014/A-FM
1000
100
10
1
0.1
0.01
0.0001 0.0010 0.0100 0.1000 1.0000
POR Setting Capacitance (uF)
DS9014/A-02 May 2006 www.richtek.com
7
RT9014/A
Preliminary
4.8
V
IN
(V)
3.8
V
OUT2
(10mV/Div)
V
OUT1
(10mV/Div)
4.8
V
IN
(V)
3.8
V
OUT2
(10mV/Div)
Line Transient Response
RT9014/A-GS, Both I
V
= 3.8V to 4.8V
IN
LOAD
Time (100μs/Div)
Line Transient Response
RT9014/A-GS, Both I
V
= 3.8V to 4.8V
IN
LOAD
= 1mA
= 50mA
4.8
V
IN
(V)
3.8
V
OUT2
(10mV/Div)
V
OUT1
(10mV/Div)
4.8
V
IN
(V)
3.8
V
OUT2
(10mV/Div)
Line Transient Response
RT9014/A-GS, Both I
V
= 3.8V to 4.8V
IN
Time (100μs/Div)
LOAD
= 10mA
Line Transient Response
RT9014/A-GS, Both I
V
= 3.8V to 4.8V
IN
LOAD
= 100mA
V
OUT1
(10mV/Div)
I
OUT
(50mA/Div)
V
OUT1
(20mV/Div)
V
OUT2
(20mV/Div)
Time (100μs/Div)
Load Transient Response
RT9014/A-GS, I
V
= V
EN
OUT1
= 4.3V
= C
IN
CIN = C
= 10mA to 50mA
LOAD
= 1uF/X7R
OUT2
Time (250μs/Div)
V
OUT1
(10mV/Div)
I
OUT
(100mA/Div)
V
OUT1
(20mV/Div)
V
OUT2
(20mV/Div)
Time (100μs/Div)
Load Transient Response
RT9014/A-GS, I
V
= V
EN
OUT1
= 4.3V
= C
IN
CIN = C
= 10mA to 100mA
LOAD
= 1uF/X7R
OUT2
Time (250μs/Div)
DS9014/A-02 May 2006www.richtek.com
8
Preliminary
RT9014/A
(5V/Div)
(1V/Div)
V
EN
(5V/Div)
RT9014/A-FM, V
I
= I
OUT2
= 50mA
OUT1
V
EN
RT9014/A-FM
Both I
LOAD
= 10mA
Start Up
= V
V
OUT1
V
SW
OUT2
= 5V
IN
Time (5μs/Div)
Power-On
(5V/Div)
(1V/Div)
150
100
50
EN Pin Shutdown Response
RT9014/A-FM, V
I
= I
OUT1
OUT2
V
EN
V
OUT2
V
OUT1
= V
IN
SW
= 50mA
Time (50μs/Div)
= 5V
Noise
RT9014/A-GS, No LOAD
V
= V
= V
IN
EN
C
= C
IN
OUT1
= 4.5V(By battery)
SW
= C
= 1uF/X7R
OUT2
V
OUT1
(1V/Div)
V
OUT2
(2V/Div)
POR
(5V/Div)
300
200
100
-100
Noise (μV/Div)
-200
-300
RT9014/A-GS, I
V
= V
IN
EN
C
= C
IN
OUT1
0
Time (10μs/Div)
LOAD
= V
= 4.5V(By battery)
SW
= C
= 1uF/X7R
OUT2
Noise
= 50mA
Noise (μV/Div)
0
-50
-100
-150
Time (10ms/Div)
Time (10ms/Div)
DS9014/A-02 May 2006 www.richtek.com
9
RT9014/A
Applications Information
Preliminary
Like any low-dropout regulator, the external capacitors used
with the RT9014/A must be carefully selected for regulator
stability and performance. Using a capacitor whose value
is > 1μF on the RT9014/A input and the amount of
capacitance can be increased without limit. The input
capacitor must be located a distance of not more than 0.5
inch from the input pin of the IC and returned to a clean
analog ground. Any good quality ceramic or tantalum can
be used for this capacitor. The capacitor with larger value
and lower ESR (equivalent series resistance) provides
better PSRR and line-transient response.
The output capacitor must meet both requirements for
minimum amount of capacitance and ESR in all LDOs
application. The RT9014/A is designed specifically to work
with low ESR ceramic output capacitor in space-saving
and performance consideration. Using a ceramic capacitor
whose value is at least 1μF with ESR is > 20mΩ on the
RT9014/A output ensures stability. The RT9014/A still
works well with output capacitor of other types due to the
wide stable ESR range. Figure 1. shows the curves of
allowable ESR range as a function of load current for various
output capacitor values. Output capacitor of larger
capacitance can reduce noise and improve load transient
response, stability, and PSRR. The output capacitor should
be located not more than 0.5 inch from the VOUT pin of
the RT9014/A and returned to a clean analog ground.
Thermal Considerations
Thermal protection limits power dissipation in RT9014/A.
When the operation junction temperature exceeds 170°C,
the OTP circuit starts the thermal shutdown function and
turns the pass element off. The pass element turn on again
after the junction temperature cools by 40°C. RT9014/A
lowers its OTP trip level from 170°C to 110°C when output
short circuit occurs (V
< 0.4V) as shown in Figure 2. It
OUT
limits IC case temperature under 100°C and provides
maximum safety to customer while output short circuit
occurring.
V
Short to GND
OUT
0.4V
V
OUT
I
OUT
TSD
°
170 C
110 C
OTP Trip Point
IC Te mpe ra ture
°
°
110 C
80 C
°
Region of Stable C
100
10
ESR (Ω)
ESR (Ω)
OUT
OUT
1
0.1
0.01
Region of Stable C
Region of Stable C
0.001
0 50 100 150 200 250 300
Figure 1. Stable Cout ESR Range
10
OUT
Unstable Range
Stable Range
Simulation Verify
Load Current (mA)
ESR vs. Load Current
RT9014-FM, V
C
= C
IN
OUT1
C
= 1uF/X7R
OUT2
= 5V
IN
=
Figure 2. Short Circuit Thermal Folded Back Protection
when Output Short Circuit Occurs (Patent)
For continuous operation, do not exceed absolute
maximum operation junction temperature 125°C. The
power dissipation definition in device is :
PD = (V
IN
− V
OUT
) x I
+ VIN x I
OUT
Q
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
be calculated by following formula :
P
Where T
D(MAX)
= ( T
J(MAX)
J(MAX)
temperature 125°C, T
θ
is the junction to ambient thermal resistance.
JA
− T
) /θ
A
JA
is the maximum operation junction
is the ambient temperature and the
A
DS9014/A-02 May 2006www.richtek.com
Preliminary
For recommended operating conditions specification of
RT9014/A, where T
temperature of the die (125°C) and TA is the operated
ambient temperature. The junction to ambient thermal
resistance (θJA is layout dependent) for WDFN-10L 3x3
package is 108°C/W on the standard JEDEC 51-3 single-
layer thermal test board. The maximum power dissipation
at TA = 25°C can be calculated by following formula :
is the maximum junction
J(MAX)
RT9014/A
P
= ( 125°C − 25°C ) / 108 = 0.926W for
D(MAX)
WDFN-10L 3x3 packages
The maximum power dissipation depends on operating
ambient temperature for fixed T
resistance θ
. For RT9014/A packages, the Figure 3 of
JA
and thermal
J(MAX)
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
Power Dissipation vs. Ambient Temperature
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Power Dissipation (W)
0.1
0
0 25 50 75 100 125
Ambient Temperature
WDFN-10L 3x3
(°C)
Figure 3. Derating Curves for RT9014/A Packages
DS9014/A-02 May 2006 www.richtek.com
11
RT9014/A
Outline Dimension
Preliminary
D
E
A
A3
A1
D2
L
E2
SEE DETAIL A
1
e
b
2
1
1
2
DETAIL A
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters Dimensions In Inches
Symbol
Min Max Min Max
A 0.700 0.800 0.028 0.031
A1 0.000 0.050 0.000 0.002
A3 0.175 0.250 0.007 0.010
b 0.180 0.300 0.007 0.012
D 2.950 3.050 0.116 0.120
D2 2.300 2.650 0.091 0.104
E 2.950 3.050 0.116 0.120
E2 1.500 1.750 0.059 0.069
e 0.500 0.020
L 0.350 0.450
RICHTEK TECHNOLOGY CORP .
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
0.014 0.018
W-Type 10L DFN 3x3 Package
RICHTEK TECHNOLOGY CORP .
Taipei Office (Marketing)
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek.com
12
DS9014/A-02 May 2006www.richtek.com
Loading...