AP7346

AP7346
DUAL HIGH ACCURACY CURRENT LIMIT LDO WITH ENABLE
Pin Assignments
The AP7346 is a dual high accuracy current limit ,low dropout
regulator with high output voltage accuracy, low RDS(ON), high PSRR,
EN2
6
5
4
1
2
3
GND
With its low power consumption and line and load transient response,
the AP7346 is well suited for low power handheld communication
equipment.
VIN
Each of regulators includes a voltage reference, error amplifier,
current limit circuit and an enable input to turn on/ off output. With the
integrated resistor network, fixed output voltage versions can be
delivered.
VOUT2
NEW PRODUCT
low output noise and low quiescent current. This regulator is based on
a CMOS process.
EN1
Top View
VOUT1
Description
X2-DFN1212-6
The AP7346 is packaged in X2-DFN1212-6 package and allows for
smallest footprint and dense PCB layout.
Applications
Features

Low VIN and Wide VIN Range: 1.7V to 5.25V


High Accuracy Current Limit: 157mA+/- 25mA
VOUT Accuracy: ±1%






Ripple Rejection: 75dB at 1kHz
Low Output Noise: 60µVrms from 10Hz to 100kHz
Quiescent Current as Low as 35µA
VOUT Fixed 1.2V to 3.6V
Totally Lead-Free & and Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free, Green Device (Note 3)
Notes:








Fingerprint Modular
Smart Phone/PAD
RF Supply
Cameras
Portable Video
Portable Media Player
Wireless Adapter
Wireless Communication
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
AP7346
AP7346
Document number: DS38082 Rev. 1 - 2
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AP7346
Pin Descriptions
Pin Name
1
VOUT1
Channel 1 output voltage pin
2
VOUT2
Channel 2 output voltage pin
3
GND
Ground
4
EN2
Chanel 2 enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables channel 2 output, while pulling it low
puts Chanel 2 regulator into shutdown mode.
5
VIN
Power input pin
6
EN1
Chanel 1 enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables channel 1 output, while pulling it low
puts Chanel 1 regulator into shutdown mode.
–
Thermal PAD
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.
NEW PRODUCT
Pin Number
Function
Functional Block Diagram
EN1
VIN
EN2
With Discharge
AP7346
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AP7346
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified. Note 4)
NEW PRODUCT
Symbol
Rating
Unit
VIN
Input Voltage
6.0
V
VEN
Input Voltage at EN Pins
6.0
V
VOUT
Output Voltage
-0.3 to VIN +0.3
V
IOUT
Output Current
130
mA
PD
Power Dissipation
600
mW
TA
Operating Ambient Temperature
-40 to +85
°C
Storage Temperature
-55 to +125
°C
TSTG
Note 4:
Parameter
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 periods may affect device reliability.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
VIN
Input Voltage
IOUT
Output Current
TA
Operating Ambient Temperature
AP7346
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Min
Max
Unit
1.7
5.25
V
0
130
mA
-40
+85
°C
July 2015
© Diodes Incorporated
AP7346
Electrical Characteristics
(@TA = +25°C, VIN = VOUT+1V (VOUT > 1.5V), VIN = 2.5V (VOUT ≤ 1.5V), IOUT = 1mA, CIN = COUT = 1.0µF,
unless otherwise specified.)
Parameter
Input Voltage
Conditions
TA = -40°C to +85°C
VIN = (VOUT-NOM+1.0V) to
Output Voltage Accuracy (Note 11)
TA = +25°C
Typ
Max
Unit
1.7
–
5.25
V
-1
–
1
-1.5
–
1.5
5.25V,
%
TA = -40°C to +85°C
IOUT = 1mA to 120mA
NEW PRODUCT
Min
Line Regulation (∆VOUT/∆VIN/VOUT)
VIN = (VOUT-NOM +1.0V) to 5.25V, IOUT = 1.0mA
–
0.02
0.1
%/V
Load Regulation (∆VOUT/∆IOUT)
VIN = VOUT-NOM +1.0V, IOUT = 1mA to 120mA
–
15
30
mV
–
35
50
µA
Quiescent Current (Note 6)
Set EN1 high, set EN2 low, or set EN2 high, set
EN1 low, No load
Set EN1/EN2 high, No load
–
70
100
µA
ISTANDBY
Set EN1/EN2 low, No load
–
0.1
1.0
µA
Output Current
–
130
–
–
mA
Fold-back Short Current (Note 7)
VOUT short to ground
–
55
–
mA
–
75
–
dB
–
60
–
µVrms
VOUT ≤ 1.2V
–
0.48
0.59
1.2V < VOUT ≤ 1.4V
–
0.39
0.50
1.4V < VOUT ≤ 1.7V
–
0.35
0.44
1.7V < VOUT ≤ 2.1V
–
0.30
0.39
2.1V < VOUT ≤ 2.5V
–
0.26
0.34
2.5V < VOUT ≤ 3.0V
–
0.25
0.30
3.0V < VOUT ≤ 3.6V
–
0.22
0.29
PSRR (Note 8)
Output Noise Voltage (Notes 8 & 9)
Dropout Voltage (Note 5)
VIN = (VOUT+1V) VDC + 0.2Vp-pAC,
VOUT ≥1.8V, IOUT = 30mA
f = 1kHz
BW = 10Hz to 100kHz, IOUT = 30mA
IOUT = 120mA
V
Output Voltage Temperature Coefficient
IOUT = 30mA, TA = -40°C to +85°C
–
±30
–
ppm/°C
EN Input Low Voltage
–
0
–
0.5
V
EN Input High Voltage
–
1.3
–
5.25
V
EN Input Leakage
VEN = 0V, VIN = 5.0V or VEN = 5.0V, VIN = 0V
-1.0
–
1.0
µA
132
157
182
mA
–
50
–
Ω
OCP
On Resistance of N-channel for Autodischarge (Note 10)
Notes:
VIN = 4.0V, VEN = 0V
(Disabled)
D Version
Channels 1 & 2
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 defined here is the difference in current between the input and the output.
7. Short circuit current is measured with VOUT pulled to GND.
8. This specification is guaranteed by design.
9. To make sure lowest environment noise minimizes the influence on noise measurement.
10. AP7346 is available for built-in discharge.
11. Potential multiple grades based on following output voltage accuracy.
AP7346
Document number: DS38082 Rev. 1 - 2
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AP7346
NEW PRODUCT
Performance Characteristics
AP7346
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AP7346
NEW PRODUCT
Performance Characteristics (Cont.)
AP7346
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AP7346
NEW PRODUCT
Performance Characteristics (Cont.)
Line Transient Response Waveforms（IOUT=30mA, tR=tF=5μs, CIN=none, COUT1=COUT2=0.47μF, TA= +25°C）
4
3
2
Input Voltage
1.82
Output Voltage
1.80
Input Voltage V IN (V)
Output Voltage V OUT (V)
VOUT =1.8V
1.78
0
20
40
60
80
100
Time t (µs)
AP7346
Document number: DS38082 Rev. 1 - 2
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AP7346
Performance Characteristics (Cont.)
Load Transient Response Waveforms (VIN=VOUT+1V, CIN=COUT1=COUT2=0.47μF, TA= +25°C)
3.4
3.3
Output Voltage IOUT=30mA
80
160
240
320
3.2
Output Current
50mA  100mA
3.4
3.3
3.2
Output Voltage
1.9
1.8
Output Voltage Iout=30mA
1.7
0
400
80
3.4
3.3
Output Voltage IOUT=30mA
160
240
320
3.2
Output Voltage V OUT (V)
Output Voltage
Output Current I OUT (mA)
200
100
0
Output Current
0.1mA  150mA
80
Document number: DS38082 Rev. 1 - 2
320
400
200
100
0
Output Current
0.1mA  130mA
3.4
3.3
3.2
1.9
Output Voltage
1.8
Output Voltage Iout=30mA
1.7
0
400
80
160
240
320
400
Time t (µs)
Time t (µs)
AP7346
240
VOUT =3.3V
VOUT =1.8V
0
160
Time t (µs)
Time t (µs)
1.9
1.8
1.7
Output Current I OUT (mA)
Output Voltage
150
100
50
0
Output Current I OUT (mA)
1.9
1.8
1.7
Output Voltage V OUT (V)
150
100
50
0
Output Current IOUT (mA)
Output Voltage V OUT (V)
VOUT =3.3V
Output Current
50mA  100mA
0
Output Voltage V OUT (V)
NEW PRODUCT
VOUT =1.8V
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AP7346
Performance Characteristics (Cont.)
Turn On Waveform of Output Discharge Versions (VIN=VOUT+1V, CIN=COUT1=COUT2=0.47μF, TA= +25°C)
VOUT = 3.3V
2
1
Output Voltage
0
40
80
120
IOUT=0mA
IOUT=30mA
IOUT=150mA
160
EN Input Voltage
Output Voltage V OUT (V)
1
0
EN Input Voltage VEN (V)
Output Voltage V OUT (V)
4
3
2
0
2
0
4
2
Output Voltage
0
200
0
40
Time t (µs)
80
120
IOUT=0mA
IOUT=30mA
IOUT=130mA
160
200
Time t (µs)
Turn Off Waveform of Output Discharge versions (VIN=VOUT+1V, CIN=COUT1=COUT2=0.47μF, TA= +25°C)
VOUT = 3.3V
2
Output Voltage
IOUT=0mA
IOUT=30mA
IOUT=150mA
0
0
40
80
120
160
Output Voltage V OUT (V)
1
0
EN Input Voltage VEN (V)
3
2
1
2
Document number: DS38082 Rev. 1 - 2
0
4
2
Output Voltage
IOUT=0mA
IOUT=30mA
IOUT=130mA
0
200
0
Time t (µs)
AP7346
4
EN Input Voltage
EN Input Voltage
EN Input Voltage VEN (V)
VOUT =1.8V
Output Voltage V OUT (V)
NEW PRODUCT
EN Input Voltage
EN Input Voltage VEN (V)
VOUT =1.8V
40
80
120
160
200
Time t (µs)
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AP7346
Application Information
Output Capacitor
An output capacitor (COUT) is needed to improve transient response and maintain stability. The AP7346 is stable with very small ceramic output
capacitors. The ESR (Equivalent Series Resistance) and capacitance drive the selection. If the application has large load variations, it is
recommended to utilize low-ESR bulk capacitors. It is recommended to place ceramic capacitors as close as possible to the load and the GND pin
and care should be taken to reduce the impedance in the layout.
To prevent the input voltage from dropping during load steps, it is recommended to utilize an input capacitor (CIN). A minimum 0.47μF ceramic
capacitor is recommended between VIN and GND pin to decouple input power supply glitch. This input capacitor must be located as close as
possible to the device to assure input stability and reduce noise. For PCB layout, a wide copper trace is required for both VIN and GND pin.
Enable Control
The AP7346 is turned on by setting the EN pins high, and is turned off by pulling it low. If this feature is not used, the EN pins should be tied to VIN
pin to keep the regulator output on at all time. To ensure proper operation, the signal source used to drive the EN pins must be able to swing above
and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section.
Short Circuit Protection
When VOUT pins are short-circuit to GND, short circuit protection will be triggered and clamp the output current to approximately 60mA. This feature
protects the regulator from over-current and damage due to overheating.
Layout Considerations
For good ground loop and stability, the input and output capacitors should be located close to the input, output, and GND pin of the device. The
regulator GND pin should be connected to the external circuit ground to reduce voltage drop caused by trace impedance. Ground plane is generally
used to reduce trace impedance. Wide trace should be used for large current paths from V IN to VOUT, and load circuit.
ESR vs. Output Current
Ceramic type output capacitor is recommended for this series; however, the other output capacitors with low ESR also can be used. The relations
between IOUT (Output Current) and ESR of an output capacitor are shown below. The stable region is marked as the hatched area in the graph.
Measurement conditions: Frequency Band: 10Hz to 2MHz, Temperature: −40°C to +85°C.
ESR vs. Output Current
AP7346-18
ESR vs. Output Current
AP7346-33
100
100
10
10
ESR (Ω)
-40°C
85°C
1
ESR (Ω)
NEW PRODUCT
Input Capacitor
0.1
0.01
-40°C
85°C
1
0.1
0.01
0.001
0.001
0
50
100
150
200
250
300
Output Current IOUT (mA)
AP7346
Document number: DS38082 Rev. 1 - 2
0
50
100
150
200
250
300
Output Current IOUT (mA)
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AP7346
Ordering Information
AP7346X - XXXX XXX - X
Output Discharge
D : Output Discharge
CH1
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
36 : 3.6V
NEW PRODUCT
Device
Package
CH1/CH2 Output Voltage
CH2
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
28 : 2.8V
30 : 3.0V
33 : 3.3V
FS6 : X2-DFN1212-6
7 : Tape & Reel
7” Tape and Reel
Package
Code
Packaging
FS6
X2-DFN1212-6
AP7346D-XXXXFS6-7
Packing
Quantity
Part Number Suffix
5000/Tape & Reel
-7
Marking Information
(1)
X2-DFN1212-6
(Top View)
XXX
YWX
XXX : Identification Code
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : Internal code
Part Number
VOUT1/VOUT2
Package
Identification Code
AP7346D-1218FS6-7
1.2V/1.8V
X2-DFN1212-6
EAA
AP7346D-1528FS6-7
1.5V/2.8V
X2-DFN1212-6
EAB
AP7346D-1815FS6-7
1.8V/1.5V
X2-DFN1212-6
EAC
AP7346D-1818FS6-7
1.8V/1.8V
X2-DFN1212-6
EAD
AP7346D-1828FS6-7
1.8V/2.8V
X2-DFN1212-6
EAE
AP7346D-1833FS6-7
1.8V/3.3V
X2-DFN1212-6
EAF
AP7346D-2518FS6-7
2.5V/1.8V
X2-DFN1212-6
EAG
AP7346
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AP7346
NEW PRODUCT
Marking Information (Cont.)
AP7346D-2812FS6-7
2.8V/1.2V
X2-DFN1212-6
EAH
AP7346D-2818FS6-7
2.8V/1.8V
X2-DFN1212-6
EAJ
AP7346D-2825FS6-7
2.8V/2.5V
X2-DFN1212-6
EAK
AP7346D-2833FS6-7
2.8V/3.3V
X2-DFN1212-6
EAM
AP7346D-3018FS6-7
3.0V/1.8V
X2-DFN1212-6
EAN
AP7346D-3028FS6-7
3.0V/2.8V
X2-DFN1212-6
EAP
AP7346D-3030FS6-7
3.0V/3.0V
X2-DFN1212-6
EAR
AP7346D-3318FS6-7
3.3V/1.8V
X2-DFN1212-6
EAS
AP7346D-3328FS6-7
3.3V/2.8V
X2-DFN1212-6
EAT
AP7346D-3330FS6-7
3.3V/3.0V
X2-DFN1212-6
EAU
AP7346D-3333FS6-7
3.3V/3.3V
X2-DFN1212-6
EAV
AP7346D-3612FS6-7
3.6V/1.2V
X2-DFN1212-6
EAW
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: X2-DFN1212-6
A1
A
A3
Seating Plane
X2-DFN1212-6
Dim Min
Max
Typ
A
-
0.40
0.39
A1
0.00
0.05 0.020
A3
0.13
b
0.13
0.23
0.18
D
1.15
1.25
1.20
D2
0.89
0.99
0.94
E
1.15
1.25
1.20
E2
0.25
0.35
0.30
e
0.40
k
0.15
0.25
0.20
L
0.15
0.25
0.20
z
0.11
z1
0.05
All Dimensions in mm
D
Pin 1 ID C0.15
z1
D2
E2
k
E
L
b
z
e
AP7346
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AP7346
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: X2-DFN1212-6
X2
C
Dimensions
NEW PRODUCT
Y1
X1
C
G
X
X1
X2
Y
Y1
Y2
G
Y2
Y
Value
(in mm)
0.400
0.150
0.250
0.940
1.050
0.400
0.300
1.400
X
Tape Orientation
XX
YWX
XX
YWX
XX
YWX
Pin 1
Note:
The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.
AP7346
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AP7346
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
NEW PRODUCT
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without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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AP7346
Document number: DS38082 Rev. 1 - 2
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