AP7343
300mA HIGH PSRR LOW NOISE LDO WITH ENABLE
Description
The AP7343 is a low dropout regulator with high output voltage
accuracy, low R
DS(ON)
, high PSRR, low output noise and low
quiescent current. This regulator is based on a CMOS process.
The AP7343 includes a voltage reference, error amplifier, current limit
circuit and an enable input to turn it on and off. With the integrated
resistor network fixed output voltage versions can be delivered.
With its low power consumption and line and load transient response,
the AP7343 is well suited for low power handheld communication
equipment.
The AP7343 is packaged in X2-DFN1010-4 (Type B) and SOT25
packages, allows for smallest footprint and dense PCB layout.
Pin Assignments
(Top View)
(Bottom View)
EP
X2-DFN1010-4 (Type B)
PIN1 – V
OUT
, PIN2 – GND, PIN3 – EN, PIN4 – V
IN
(Top View)
Features
Low V
IN
and Wide V
IN
Range: 1.7V to 5.25V
Guarantee Output Current: 300mA
V
OUT
Accuracy ±1%
Ripple Rejection 75dB at 1kHz
Low Output Noise, 60µVrms from 10Hz to 100kHz
Quiescent Current as Low as 35µA
V
OUT
Fixed 0.9V to 3.6V
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
V
IN
1
GND 2
EN 3
5 V
OUT
4 NC
SOT25
Applications
Smart Phone/Tablet
RF Supply
Cameras
Portable Video
Portable Media Player
Wireless Adapter
Wireless Communication
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free,"Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
V
IN
V
IN
V
OUT
AP7343
V
OUT
C
IN
1μF
C
OUT
1μF
EN
GND
AP7343
Document number: DS37952 Rev. 4 - 2
1 of 18
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November 2016
© Diodes Incorporated
AP7343
Pin Descriptions
Pin Number
X2-
DFN1010-4
(Type B)
1
2
3
4
—
EP
SOT25
5
2
3
1
4
—
Pin Name
Function
V
OUT
GND
EN
V
IN
NC
Exposed Pad
Power Output Pin
Ground
Enable Pin
This pin should be driven either high or low and must not be floating. Driving this pin high enables
the regulator, while pulling it low puts the regulator into shutdown mode
Power Input Pin
No connection
In PCB layout, prefer to use large copper area to cover this pad for better thermal dissipation, then
connect this area to GND or leave it open. However, do not use it as GND electrode function alone
Functional Block Diagram
V
IN
V
OUT
V
IN
V
OUT
VREF
Thermal
Shutdown
Current Limit
VREF
Thermal
Shutdown
Current Limit
EN
GND
EN
GND
AP7343 (With Discharge)
AP7343 (Without Discharge)
Absolute Maximum Ratings
(Note 4) (@T
A
= +25° unless otherwise specified.)
C,
Symbol
ESD HBM
ESD MM
V
IN
V
EN
V
OUT
I
OUT
P
D
T
A
T
STG
Note:
Parameter
Human Body Mode ESD Protection
Machine Mode ESD Protection
Input Voltage
Input Voltage for EN Pin
Output Voltage
Output Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Ratings
>2
> 200
6.0
6.0
-0.3 to V
IN
+ 0.3
400
400
-40 to +85
-55 to +125
Unit
KV
V
V
V
V
mA
mW
°
C
°
C
4. a). Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these conditions is not implied. Exposure to absolute-maximum-rated conditions for extended period may affect
device reliability.
b). Ratings apply to ambient temperature at +25° The JEDEC High-K board design used to derive this data was a 2 inch x 2 inch multilayer board with
C.
1oz. internal power and ground planes and 2oz. copper traces on the top and bottom of the board.
Recommended Operating Conditions
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
IN
I
OUT
T
A
Input Voltage
Output Current
Operating Ambient Temperature
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Parameter
Min
1.7
0
-40
Max
5.25
300
+85
Unit
V
mA
°
C
November 2016
© Diodes Incorporated
AP7343
Document number: DS37952 Rev. 4 - 2
AP7343
Electrical Characteristics
Parameter
Input Voltage
T
A
= -40° to +85°
C
C
V
OUT
(T) ≥ 2.0V, V
IN
= V
OUT
(T)+1V
Output Voltage Accuracy (Note 11)
V
OUT
(T) < 2.0V, V
IN
= V
OUT
(T)+1V
T
A
= +25°
C
T
A
= +25°
C
(@T
A
= +25° V
IN
= V
OUT
+1.0V, C
IN
= C
OUT
= 1.0µF, I
OUT
= 1.0mA, unless otherwise specified.)
C,
Condition
Min
1.7
V
OUT
(T)*
0.99
V
OUT
(T)-
20mV
—
—
—
—
300
—
f = 1kHz
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
1.3
-1.0
—
—
—
—
—
Typ
—
V
OUT
(T)
V
OUT
(T)
Max
5.25
V
OUT
(T)*
1.01
V
OUT
(T)+
20mV
0.1
30
60
1.0
—
—
—
—
0.80
0.70
0.58
0.44
0.39
0.34
0.30
0.29
0.82
0.72
0.60
0.46
0.41
0.36
0.32
0.31
—
—
—
0.5
5.25
+1.0
—
—
—
—
—
ppm/°
C
°
C
°
C
V
V
µA
Ω
V
V
Units
V
V
Line Regulation (dV
OUT
/dV
IN
/V
OUT
)
Load Regulation
Quiescent Current (Note 6)
I
STANDBY
Output Current
Fold-back Short Current (Note 7)
PSRR (Note 8)
Output Noise Voltage
(Note 8) (Note 9)
V
IN
= (V
OUT – Nom
+1.0V) to 5.25V, I
OUT
= 1.0mA
V
IN
= V
OUT
-
Nom
+1.0V, I
OUT
= 1mA to 300mA
I
OUT
= 0mA
V
EN
= 0V (Disabled)
—
V
OUT
Short to Ground
V
IN
= (V
OUT
+1V) V
DC
+ 0.2Vp-pAC,
V
OUT
≥ 1.8V, I
OUT
= 30mA
BW = 10Hz to 100kHz, I
OUT
= 30mA
V
OUT
= 0.9V
1.0V < V
OUT
1.2V
1.2V < V
OUT
1.4V
I
OUT
= 300mA
(X2-DFN1010-4 (Type B))
1.4V < V
OUT
1.7V
1.7V < V
OUT
2.1V
2.1V < V
OUT
2.5V
2.5V < V
OUT
3.0V
3.0V < V
OUT
3.6V
V
OUT
= 0.9V
1.0V < V
OUT
1.2V
1.2V < V
OUT
1.4V
I
OUT
= 300mA (SOT25)
1.4V < V
OUT
1.7V
1.7V < V
OUT
2.1V
2.1V < V
OUT
2.5V
2.5V < V
OUT
3.0V
3.0V < V
OUT
3.6V
0.02
15
35
0.01
—
55
75
60
0.51
0.46
0.39
0.35
0.30
0.26
0.25
0.22
0.51
0.46
0.39
0.35
0.30
0.26
0.25
0.22
±30
+150
+20
—
—
—
30
237
179
96
52
%/V
mV
µA
µA
mA
mA
dB
µVrms
Dropout Voltage (Note 5)
Output Voltage Temperature
I
OUT
= 30mA, T
A
= -40° to +85°
C
C
Coefficient
Thermal Shutdown Threshold
—
(TSHDN)
Thermal Shutdown Hysteresis (THYS) —
EN Input Low Voltage
—
EN Input High Voltage
—
EN Input Leakage
V
EN
= 0, V
IN
= 5.0V or V
EN
= 5.0V, V
IN
= 0V
On Resistance of N-Channel for Auto-
V
IN
= 4.0V, V
EN
= 0V (Disabled)
Discharge (Note 10)
Thermal Resistance Junction to
X2-DFN1010-4 (Type B)
Ambient (
JA
)
SOT25
Thermal Resistance Junction to Case X2-DFN1010-4 (Type B)
(
JC
)
SOT25
Notes:
°
C/W
5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
6. Quiescent current is defined here is the difference in current between the input and the output.
7. Short circuit current is measured with V
OUT
pulled to GND.
8. This specification is guaranteed by design.
9. To make sure lowest environment noise minimizes the influence on noise measurement.
10. AP7343 has 2 options for output, built-in discharge and non-discharge.
11. Potential multiple grades based on following output voltage accuracy.
AP7343
Document number: DS37952 Rev. 4 - 2
3 of 18
www.diodes.com
November 2016
© Diodes Incorporated
AP7343
Typical Characteristics
Output Voltage vs Output Current
V
OUT
=1.8V
2.0
3.5
3.0
Output Voltage vs Output Current
V
OUT
=2.8V
Output Voltage V
OUT
(V)
1.5
Vin=4.2V
Vin=5V
Output Voltage V
OUT
(V)
Vin=2.8V
2.5
2.0
1.5
Vin=3.8V
Vin=5V
1.0
Vin=5.25V
Vin=5.25V
0.5
1.0
0.5
0.0
0
100
200
300
400
Output Current I
OUT
(mA)
500
600
0.0
0
100
200
300
400
Output Current I
OUT
(mA)
500
600
3.5
Output Voltage vs Output Current
V
OUT
=3.3V
Vin=4.3V
Vin=5V
Vin=5.25V
Output Voltage V
OUT
(V)
2.0
Output Voltage vs. Input Voltage
V
OUT
=1.8V
3.0
Output Voltage V
OUT
(V)
1.5
2.5
2.0
1.5
1.0
0.5
0.0
0
1.0
0.5
1mA
30mA
50mA
0
1
2
3
4
5
0.0
100
200
300
400
Output Current I
OUT
(mA)
500
600
Input Voltage V
IN
(V)
3.0
2.5
Output Voltage V
OUT
(V)
Output Voltage vs. Input Voltage
V
OUT
=2.8V
3.5
3.0
Output Voltage vs. Input Voltage
V
OUT
=3.3V
2.0
1.5
1.0
Output Voltage V
OUT
(V)
2.5
2.0
1.5
1.0
0.5
0.0
1mA
30mA
50mA
0
1
2
3
4
5
0.5
0.0
0
1
2
3
4
1mA
30mA
50mA
5
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
AP7343
Document number: DS37952 Rev. 4 - 2
4 of 18
www.diodes.com
November 2016
© Diodes Incorporated
AP7343
Typical Characteristics
(Cont.)
Supply Current vs. Input Voltage
V
OUT
=1.8V
40
35
40
35
Supply Current vs. Input Voltage
V
OUT
=2.8V
Supply Current I
SS
(μA)
25
20
15
10
5
0
0
1
2
3
4
5
Supply Current I
SS
(μA)
30
30
25
20
15
10
5
0
0
1
2
3
4
5
Input Voltage V
IN
(V)
Input Voltage V
IN
(V)
40
35
30
Supply Current vs. Input Voltage
V
OUT
=3.3V
1.84
1.83
1.82
Output Voltage vs.
vs Temperature
Output Voltage Voltage
Temperature
V
OUT
=1.8V
Supply Current I
SS
(μA)
V
OUT
(V)
25
20
1.81
1.80
15
10
5
0
0
1
2
3
4
5
Input Voltage V
IN
(V)
1.79
1.78
1.77
1.76
-50
-25
0
25
50
75
100
Temperature (℃)
2.840
2.830
2.820
Output Voltage vs.
vs Temperature
Output Voltage Voltage
Temperature
V
OUT
=2.8V
3.340
3.330
3.320
Output Voltage vs.
vs Temperature
Output Voltage Voltage
Temperature
V
OUT
=3.3V
2.800
2.790
V
OUT
(V)
-50
-25
0
25
50
75
100
V
OUT
(V)
2.810
3.310
3.300
3.290
2.780
2.770
2.760
Temperature (℃)
3.280
3.270
3.260
-50
-25
0
25
50
75
100
Temperature (℃)
AP7343
Document number: DS37952 Rev. 4 - 2
5 of 18
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November 2016
© Diodes Incorporated
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