Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
General Description
The AP2318A is a series of ultra low dropout
regulators optimized for low voltage applications
where transient response and minimum input voltage
are critical.
The AP2318A provides current limit and thermal
shutdown function. Its circuit includes a trimmed
bandgap reference to assure output voltage accuracy to
be within ±1.5%. On-chip thermal shutdown provides
protection against any combination of overload and
ambient temperatures that would cause excessive
junction temperatures.
The AP2318A has adjustable version, which can set
the output voltage through two external resistors.
The AP2318A is available in the standard DFN-3x3-8
and PSOP-8 packages.
Features
· Wide Operating Voltage Range: 2.5V to 12V
· Output Voltage Accuracy: ±1.5%
· On-chip Thermal Shutdown
· ESD Rating: 3000V (Human Body Model)
600V (Machine Model)
· Operation Junction Temperature: -40oC to 125oC
Applications
· Notebook
· USB Device
· Add-on Card
· DVD Player
· PC Motherboard
DFN-3x3-8
Figure 1. Package Type of AP2318A
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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PSOP-8
Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Pin Configuration
DN Package
(DFN-3x3-8)
VIN
1
VIN
2
VOUT
VOUT
3
45
Pin Description
Pin Number
DFN-3x3-8 PSOP-8
NC
EN
VIN
VIN
1
2
3
4
8
EN
NC
7
6
GND
ADJ
Figure 2. Pin Configuration of AP2318A (Top View)
Pin Name Function
MP Package
(PSOP-8)
GND
8
ADJ
7
VOUT
6
5
NC
1, 2 3, 4 VIN Input voltage
3, 4 6 VOUT Output voltage
5 7 ADJ Adjustable voltage
6 8 GND Ground
7 1, 5 NC No connection
8 2 EN On/Off control
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Functional Block Diagram
1, 2 (3, 4)
VIN VOUT
8 (2)
EN
Enable
Bandgap
Reference
V
RC
Compensation
Error
FB
Amp lifie r
Figure 3. Functional Block Diagram of AP2318A
OVP
Thermal
Shutdown
Current
Limit
3, 4 (6)
5 (7)
6 (8)
ADJ
GND
A (B)
A: DFN-3x3-8
B: PSOP-8
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Ordering Information
AP2318A -
Circuit Type
E1: Lead Free
G1: Green
Package
DN: DFN-3x3-8
MP: PSOP-8
Package
DFN-3x3-8
PSOP-8
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number , are RoHS compliant. Products with
"G1" suffix are available in green packages.
Temperature
Range
125oC
-40 to
-40 to
125oC
Lead Free Green Lead Free Green
AP2318AMP-ADJE1 AP2318AMP-ADJG1 2318A-ADJE1 2318A-ADJG1
AP2318AMP-ADJTRE1 AP2318AMP-ADJTRG1 2318A-ADJE1 2318A-ADJG1
Part Number Marking ID
AP2318ADN-ADJTRG1 B7B Tube
TR: Tape and Reel
Blank: Tube
ADJ: Adjustable Output
Packing Type
Tube
Tape & Reel
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Input Voltage V
Operating Junction Temperature T
Storage Temperature Range T
Lead Temperature (Soldering, 10sec) T
LEAD
IN
J
STG
15 V
150
-65 to 150
260
o
C
o
C
o
C
DFN-3x3-8 120
Thermal Resistance, Junction to Ambient (Note 2)
θ
JA
o
C/W
PSOP-8 108
ESD (Human Body Model) ESD 3000 V
ESD (Machine Model) ESD 600 V
Note 1: Stresses greater than 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 or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Note 2: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a
function of the maximum junction temperature, T
perature, T
)/θ
T
A
The maximum allowable power dissipation at any ambient temperature is calculated using: PD(max)=(TJ(Max) -
A.
Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will
JA.
(Max), the junction-to-ambient thermal resistance, θ
J
and the ambient tem-
JA,
go into thermal shutdown.
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Input Voltage
Enable Voltage
Operating Junction Temperature Range T
V
V
IN
EN
J
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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2.5 12 V
12 V
-40 125
o
C
Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Electrical Characteristics
Operating Conditions: 2.5V≤V
≤12V, CIN=1µF, C
IN
=2.2µF, TJ=25oC, unless otherwise specified. (P≤Maxi-
OUT
mum Power Dissipation). Limits appearing in Boldface type apply over the entire junction tem perature range for
operation of -40
Parameter
Reference Voltage
Maximum Output
Current
Line Regulation
Load Regulation
Dropout Voltage
Adjust Pin Current
Minimum Load
Current
Quiescent Current
RMS Output Noise
(% of V
OUT
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
Enable Input Voltage
Enable Input Current
Thermal Resistance
(Junction to Case)
o
)
C to 125oC.
Symbol
V
I
OUT
V
RLINE
V
RLOAD
V
DROP
I
ADJ
I
LOAD
I
V
V
I
θ
REF
T
=25oC,10mA≤I
J
(Max) VIN-V
AP2318A-ADJ
AP2318A-ADJ, I
I
OUT
I
OUT
AP2318A-ADJ
V
IN=VOUT
V
IN
∆V
OUT
(Min) V
Q
NOI
OUT
VIN=V
TA=25oC, 10Hz≤f≤20kHz
Enable logic low 0.8
EN
Enable logic high 2.25
VEN=2.25V
EN
V
EN
DFN-3x3-8 15
JC
PSOP-8 12
=2V
OUT
=10mA, V
Conditions
=10mA, VIN-V
OUT
≤1A, V
OUT
+2V≤VIN≤12V
OUT
OUT
+2V≤VIN ≤12V
OUT
=2V,
Min Typ Max Unit
1.231
1.250
1.269
1.225
1.250
1.275
1.2 1.5 A
1 6 mV
=10mA, 2.5V≤VIN ≤12V 1 6 mV
+2V, 10mA≤I
=2.5V, 10mA≤I
(∆V
)=1%, V
REF
OUT
≤1A 1 15 mV
OUT
OUT
+2V≤VIN≤12V (ADJ only)
OUT
+2V, I
OUT
=0mA
≤1A
>2V, I
OUT
=1A
1 15 mV
0.5 V
0.05 1
1.7 5 mA
250
0.003 %
150
25
5 µA
=0.8V
4 µA
o
V
µA
µA
o
C
o
C
V
C/W
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Typical Performance Characteristics
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
Output Voltage (V)
0.8
0.6
0.4
0.2
0.0
0123456789101112
AP2318A-ADJ
=2.5V
V
OUT
=25oC
T
C
I
=10mA
OUT
I
=500mA
OUT
I
=1000mA
OUT
Input Voltage (V)
Figure 4. Output Voltage vs. Input Voltag e
400
350
300
250
200
150
Supply Current (µA)
100
50
0
012345678
Input Voltage (V)
AP2318A-ADJ
=1.25V
V
OUT
TC=-40oC
TC=25oC
TC=125oC
3.0
2.8
2.6
2.4
2.2
2.0
AP2318A-ADJ
1.8
1.6
1.4
1.2
1.0
Output Voltage (V)
0.8
0.6
0.4
0.2
0.0
=2.5V
V
OUT
=3.5V
V
IN
TC= -40oC
TC=25oC
TC=125oC
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Output Current (mA)
Figure 5. Output Voltage vs. Output Current
340
336
332
328
324
320
316
Supply Current (µA)
312
308
304
300
-40-200 20406080100120
Case Temperature (oC)
AP2318A-ADJ
V
=3.25V
IN
=1.25V
V
OUT
Figure 6. Supply Current vs. Input Voltage
Figure 7. Supply Current vs. Case Temperature
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Typical Performance Characteristics(Continued)
20
18
16
14
12
10
8
6
Supply Current (mA)
4
2
0
0 150 300 450 600 750 900 1050 1200 1350 1500
AP2318A-ADJ
V
=3.25V
IN
V
=1.25V
OUT
TC=25oC
TC=-40oC
TC=125oC
Output Current (mA)
Figure 8. Supply Current vs. Output Current
0.65
AP2318A-ADJ
Dropout Voltage (V)
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
=2.5V
V
OUT
TC=-40oC
TC= 25oC
TC=125oC
0 100 200 300 400 500 600 700 800 900 1000
Output Current (mA)
20
18
16
14
12
10
8
Supply Current (mA)
6
4
2
0
0 150 300 450 600 750 900 1050 1200 1350 1500
AP2318A-ADJ
=1.25V
V
OUT
=25oC
T
C
VIN=3.25V
VIN=2.5V
VIN=12V
Output Current (mA)
Figure 9. Supply Current vs. Output Current
100
90
80
70
60
50
40
PSRR (dB)
AP2318A-ADJ
=3V to 4V
V
30
IN
V
=1.25V
OUT
20
C
=1µF, C
IN
10
I
LOAD
0
10 100 1k 10k 100k
=10mA
OUT
=2.2µF
Frequency (Hz)
Figure 10. Dropout Voltage vs. Output Current
Figure 11. PSRR vs. Frequency
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Typical Performance Characteristics (Continued)
200mA/Div
OUT
I
50mV/Div
OUT
V
∆
500mA/Div
OUT
I
100mV/Div
OUT
V
∆
Figure 13. Load Transient ResponseFigure 12. Load Transient Response
V
=2.5V, V
IN
OUT
C
IN
=1.25V, I
=1µF, C
OUT
OUT
=2.2µF
=1 to 500mA,
V
IN
=2.5V, V
C
OUT
=1µF, C
IN
=1.8V, I
OUT
=1mA to 1A,
OUT
=2.2µF
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Typical Application
V
IN
VIN
AP2318A-ADJ
EN
C
+
IN
1µF
Figure 14. Typical Application of AP2318A ADJ Version, V
GND
VOUT
ADJ
R1
R2
=1.25*(R1+R2)/R2
OUT
V
+
C
2.2µF
OUT
OUT
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Mechanical Dimensions
Unit: mm(inch)DFN-3x3-8
0.700(0.028)
0.800(0.031)
2.900(0.114)
3.100(0.122)
Pin 1 Dot
by Marking
2.900(0.114)
3.100(0.122)
0.000(0.000)
0.050(0.002)
0.153(0.006)
0.253(0.010)
1.400(0.055)
1.600(0.063)
0.180(0.007)
0.300(0.012)
N5
N4
0
5
6
.
0
)
6
0
.
2
0
(
S
C
B
N8
0.375(0.015)
0.575(0.023)
2.200(0.087)
2.400(0.094)
PIN #1
IDENTIFICATION
N1
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Data Sheet
600mA LOW DROPOUT LINEAR REGULATOR AP1117M
1A ULDO REGULATOR WITH ENABLE AP2318A
Mechanical Dimensions (Continued)
Unit: mm(inch)PSOP-8
3.800(0.150)
4.000(0.157)
2.313(0.091)
2.513(0.099)
1.270(0.050)
3.202(0.126)
°
0
°
8
0.170(0.007)
0.250(0.010)
3.402(0.134)
0.330(0.013)
0.510(0.020)
5.800(0.228)
6.200(0.244)
0.400(0.016)
1.270(0.050)
TYP
0.050(0.002)
0.150(0.006)
Note: Eject hole, oriented hole and mold mark is optional.
4.700(0.185)
5.100(0.201)
1.350(0.053)
1.550(0.061)
φ
1.350(0.053)
1.750(0.069)
May. 2011 Rev 2. 0 BCD Semiconductor Manufacturing Limited
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BCD Semiconductor Manufacturing Limited
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IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
other rights nor the rights of others.
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