AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 1 of 16
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Description
The AP78LXX Series is a three terminal positive regulator
available with fixed output voltages from 5V, 8V and 12V,
making them useful in a wide range of applications. When
used as a Zener diode/resistor combination replacement, the
AP78LXX can improve output impedance by two orders of
magnitude, and lower quiescent current. These regulators
can provide local on card regulation, eliminating the
distribution problems associated with single point regulation.
The voltages available allow the AP78LXX's to be used in
logic systems. Instrumentation, HiFi and other solid state
electronic equipment.
The AP78LXX is available in the plastic TO92, SOT89 and
SO-8 using industrial standard package technology. The
regulator can deliver 100mA output current with adequate
heat sinking. Current limiting is included to limit the peak
output current to a safe value. Safe area protection for the
output transistors is provided to limit internal power
dissipation. Thermal overload protection is integrated to
prevent the IC from overheat due to abnormal condition.
Features
• Output voltages of 5.0V, 8.0V, 12V
• Output voltage tolerances of ±5% over the operating
temperature ranges
• Output current in excess of 100mA
• Internal thermal overload protection
• Output transistor safe area protection
• Internal short circuit current limiting
• No external components
• Available in plastic TO 92, SOT89 and plastic SO-8 low
profile packages
• Lead Free Package: TO92 (Note 1)
• SO-8 and SOT89: Available in “Green” Molding
Compound (No Br, Sb) (Note 2)
• Lead Free Finish / RoHS Complia nt (Note 3)
Pin Assignments
GND
V
OUT
V
IN
TO92
(Bottom View)
SO-8
(Top View)
V
IN
GND
GND
NC
GND
GND
V
OUT
NC
8
7
6
5
1
2
3
4
GND
(
Top View
)
123
SOT8
9
V
OUT
V
IN
Applications
• Communication
• CD-ROM
• DVD-Player
• Set-Top Box
Notes: 1. TO92 is available in “Lead Free” product only.
2. SO-8 and SOT89 are available in “Green” products only.
3. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2). All applicable RoHS exemptions applied.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 2 of 16
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© Diodes Incorporated
Typical Application Circuit
Fixed Output Regulator
AP78Lxx OUT
IN
Input Output
GND
C1
0.33µF
†
C2
0.1µF
‡
(†) Required if the regulator is located more than 3” from the power supply filter
(‡) See Note 5 in the electrical characteristics table
Pin Descriptions
Pin Name Description
VIN Operating Voltage Input
VOUT Voltage Output Pin
GND Ground
NC No Connection
Functional Block Diagram
Introduction
The AP78LXX series is a three terminal device with fixed output voltages from 5V,8V and 12V. The AP78LXX fixed voltage
regulator series has built-in thermal overload protection which prevents the device from being damaged due to excessive
junction temperature. The regulator also cont ains internal short-circuit prote ction which limits the maximum output current, an d
safe-area protection for the pass transistor which reduces the short-circuit current as the voltage across the pass tra nsistor is
increased.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 3 of 16
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© Diodes Incorporated
Absolute Maximum Ratings (TA = 25°C)
Symbol Parameter Rating Unit
ESD HBM Human Body Model ESD Protection 3 KV
ESD MM Machine Model ESD Protection 250 V
VCC Supply Voltage 30 V
VOUT
Output Voltage to Ground
AP78L05 5 V
AP78L08 8
AP78L12 12
TST Storage Temperature -65 to +150 °C
TOP Operating Junction Temperature -20 to +125 °C
TMJ Maximum Junction T emperature 150 °C
Recommended Operating Conditions (TA = 25°C)
Symbol Parameter Min Max Unit
VIN Input Voltage AP78L05 7 20
V
AP78L08 10.5 23
AP78L12 14.5 27
IOUT Output Current 0 100 mA
TA Operating Ambient Temperature -20 +85
oC
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 4 of 16
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AP78Lxx Electrical Characteristics (All Output Voltage Versions)
Limits in standard typeface are for TA = 25℃, Bold typeface applies o ver TJ = -20°C to +125°C for TO92, SOT89 and SO-8 packages.
Unless otherwise specified: IO = 40mA, CI = 0.33µF, CO = 0.1µF.
AP78L05
Unless otherwise specified, VIN = 10V
Symbol Parameter Conditions Min Typ. Max Unit
VO Output Voltage
4.8 5 5.2
V
7V ≤ VIN ≤ 20V
1mA ≤ IO ≤ 40mA 4.75 5.25
1mA ≤ IO ≤ 70mA 4.75 5.25
ΔVO Line Regulation 7V ≤ VIN ≤ 20V 18 75
mV
8V ≤ VIN ≤ 20V 10 54
ΔVO Load Regulation 1mA ≤ IO ≤ 100mA 20 60
mV
1mA ≤ IO ≤ 40mA 5 30
IQ Quiescent Current 3 5 mA
ΔIQ Quiescent Current Change 8V ≤ VIN ≤ 20V
1.0
1mA ≤ IO ≤ 40mA
0.1
VN Output Noise Voltage f = 10Hz to 100kHz
(Note 4) - 40 µV
ΔVIN/ΔVOUT Ripple Rejection f = 120Hz
8V ≤ VIN ≤ 16V 47 62 dB
IPK Peak Output Current 140 mA
ΔVO/ΔT Average Output Voltage Tempco IO = 5mA -0.65 mV/oC
VIN(MIN) Minimum Value of Input Voltage
Required to Maintain Line Re gulation 6.7 7 V
θJA Thermal Resistance Junction to
Ambient
TO92 (Note 5) 176
oC/W
SO-8 (Note 6) 153
SOT89 (Note 7) 145
θJC Thermal Resistance Junction to Case TO92 (Note 5) 33
SO-8 (Note 6) 18
SOT89 (Note 7) 25
Notes: 4. Recommend 0.01µF minimum load capacitance at output to suppress high frequency noise.
5. Test conditions for TO92: No heat sink, no air flow.
6. Test conditions for SO-8: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.
7. Test conditions for SOT89: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 5 of 16
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AP78Lxx Electrical Characteristics (cont.)
AP78L08
Unless otherwise specified, VIN = 14V
Symbol Parameter Conditions Min Typ. Max Unit
VO Output Voltage
7.7 8 8.3
V
10.5V ≤ VIN ≤ 23V
1mA ≤ IO ≤ 40mA 7.6 8.4
1mA ≤ IO ≤ 70mA 7.6 8.4
ΔVO Line Regulation 10.5V ≤ VIN ≤ 23V 42 175
mV
11V ≤ VIN ≤ 23V 36 125
ΔVO Load Regulation 1mA ≤ IO ≤ 100mA 18 80
mV
1mA ≤ IO ≤ 40mA 10 40
IQ Quiescent Current 2 5.5 mA
ΔIQ Quiescent Current Change 11V ≤ VIN ≤ 23V
1.5
1mA ≤ IO ≤ 40mA
0.1
VN Output Noise Voltage f = 10Hz to 100kHz
(Note 4) - 54 µV
ΔVIN/ΔVOUT Ripple Rejection f = 120Hz
13V ≤ VIN ≤ 23V 37 46 dB
IPK Peak Output Current 140 mA
ΔVO/ΔT Average Output Voltage Tempco IO = 5mA -0.8 mV/ oC
VIN(MIN) Minimum Value of Input Voltage
Required to Maintain Line Re gulation 9.7 V
θJA Thermal Resistance Junction to
Ambient
TO92 (Note 5) 176 oC/W SO-8 (Note 6) 153
SOT89 (Note 7) 157
θJC Thermal Resistance Junction to case TO92 (Note 5) 33 oC/W
SO-8 (Note 6) 18
SOT89 (Note 7) 33
Notes: 4. Recommend 0.01µF minimum load capacitance at output to suppress high frequency noise.
5. Test conditions for TO92: No heat sink, no air flow.
6. Test conditions for SO-8: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.
7. Test conditions for SOT89: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 6 of 16
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AP78Lxx Electrical Characteristics (cont.)
AP78L12
Unless otherwise specified, VIN = 19V
Symbol Parameter Conditions Min Typ. Max Unit
VO Output Voltage
11.5 12 12.5
V
14.5V ≤ VIN ≤ 27V
1mA ≤ IO ≤ 40mA 11.4 12.6
1mA ≤ IO ≤ 70mA 11.4 12.6
ΔVO Line Regulation 14.5V ≤ VIN ≤ 27V 30 180
mV
16V ≤ VIN ≤ 27V 20 110
ΔVO Load Regulation 1mA ≤ IO ≤ 100mA 30 100
mV
1mA ≤ IO ≤ 40mA 10 50
IQ Quiescent Current 3 5 mA
ΔIQ Quiescent Current Change 16V ≤ VIN ≤ 27V
1
1mA ≤ IO ≤ 40mA
0.1
VN Output Noise Voltage 80 µV
ΔVIN/ΔVOUT Ripple Rejection f = 120Hz
15V ≤ VIN ≤ 25V 40 54 dB
IPK Peak Output Current 140 mA
ΔVO/ΔT Average Output Voltage
Tempco IO = 5mA -1.0 mV/ oC
VIN(MIN) Minimum Value of Input
Voltage Required to Maintain
Line Regulation 13.7 14.5 V
θJA Thermal Resistance Junction
to Ambient
TO92 (Note 5) 176 oC/W SO-8 (Note 6) 153
SOT89 (Note 7) 145
θJC Thermal Resistance Junction
to case
TO92 (Note 5) 33 oC/W
SO-8 (Note 6) 18
SOT89 (Note 7) 25
Notes: 5. Test conditions for TO92: No heat sink, no air flow.
6. Test conditions for SO-8: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.
7. Test conditions for SOT89: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 7 of 16
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Typical Performance Characteristics
For AP78L05
51015202530
INPUT-O UTPUT DIFFERENTIAL (V)
Peak Output Current
350
300
250
200
150
100
50
0
O
U
T
P
U
T
C
U
R
R
EN
T
(mA)
Δ
V = 100mV
OUT
T = -25°C
A
T = 25°C
A
T = 150°C
A
51015202530
INP U T VOLTAG E (V)
Qu ie scent Current
4.0
3.8
3.2
3.0
2.6
2.2
2.0
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
3.6
3.4
2.8
2.4
V = 5V
I = 40mA
T = 25°C
OUT
OUT
A
-25 0 25 50 75 125
JUNCTION TEMPERATURE (°C)
Quiescent Current
100
3.4
3.3
3.0
2.9
2.7
2.5
2.4
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
3.2
3.1
2.8
2.6
V = 10V
V = 5V
I = 40mA
IN
OUT
OUT
10 100 1K 100K
FREQUENCY (Hz)
Ripple Rejection
10K
100
60
0
RIPPLE REJECTION (db)
80
40
20
V = 10V
V = 5V
I = 40mA
T = 25C
IN
OUT
OUT
A
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 8 of 16
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Typical Performance Characteristics (cont.)
For AP78L05
-25 0 25 50 75 125
JUNCTION TEMPERATURE (°C)
Dropout Volt age
100
2.5
1.5
0.0
IN
P
U
T
-
O
U
T
P
U
T
DIFFE
R
EN
T
IAL (V )
2.0
1.0
0.5
DROPOUT CONDITIONS
V = 2% of V
Δ
OUT OUT
I = 40mA
OUT
I = 70mA
OUT
I = 1mA
OUT
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 9 of 16
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Typical Performance Characteristics
For AP78L08
51015202530
INPUT -OUTPUT DIFFERENTIAL (V)
Peak Output Current
300
250
200
150
100
50
0
O
U
T
P
U
T
C
U
R
R
E
N
T
(mA)
10 15 20 25 30
INP UT VOLTAGE (V)
Qu iesce nt C ur r ent
2.80
2.71
2.62
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
2.75
2.67
-25 0 25 50 75 125
JUNCTION TEMPERATURE (°C)
Qu iesce nt C ur r ent
100
3.
2
3.1
2.9
2.8
2.5
2.4
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
3.0
2.7
2.6
V = 14V
V = 8V
I = 40mA
IN
OUT
OUT
-25 0 25 50 75 125
JUNCTION TEMPERA TURE (°C)
Dropout Voltage
100
2.5
1.5
0.0
I
N
P
U
T
-
O
U
T
P
U
T
(V)
2.0
1.0
0.5
AP78L05/08/12
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AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 10 of 16
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Typical Performance Characteristics (cont.)
For AP78L12
14 18 22 26 30
INPUT-OUTPUT DIFFERENTIAL (V)
Peak Output Current
300
250
200
150
100
50
0
O
U
T
P
U
T
C
U
R
R
EN
T
(mA)
10 15 20 25 30
INP UT VOLTAGE (V)
Qu iesce nt C ur r ent
2.960
2.945
2.930
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
2.955
2.935
2.950
2.940
-25 0 25 50 75 125
JUNCTION TEMPERATURE (°C)
Quiescent Current
100
3.2
3.1
2.9
2.8
2.5
Q
U
IES
C
E
N
T
C
U
R
R
E
N
T
(mA)
3.0
2.7
2.6
V = 19V
V = 12V
I = 40mA
IN
OUT
OUT
-25 0 25 50 75 125
JUNCTION TEMPERA TURE (°C)
Dropout Voltage
100
2.5
1.5
0.0
I
N
P
U
T
-
O
U
T
P
U
T
(V)
2.0
1.0
0.5
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 11 of 16
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Lead-free
Ordering Information
Package Packing
A :
A
mm o Box
Lead Free
L : Lead Free (Note 8)
AP78L
X
X
X
X
-
X
V : TO92
S : SO-8
Y : SOT89 13 : Tape & Reel
G : Green (Note 9)
Output version
05 : 5V
08 : 8V
12 : 12V
Device Package
Code Packaging
(Note 10)
Ammo Box / Tube 13” Tape and Reel
Quantity Part Number
Suffix Quantity Part Number
Suffix
AP78LXXVL-A V TO92 2000/Box -A NA NA
AP78LXXSG-13 S SO-8 NA NA 2500/Tape & Reel -13
AP78LXXYG-13 Y SOT89 NA NA 2500/T ape & Reel -13
Notes: 8. TO92 is available in “Lead Free” product only.
9. SO-8 and SOT89 are available in “Green” products only.
10. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/data sheets/ap02001.pdf.
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 12 of 16
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Marking Information
(1) TO92
Year : "7" = 2007
"8" = 2008
Xth Week: 01~52
AP78L XX
Internal code
YWWX
( Top View )
123
XL : Lead Free
~
Part Number
05 : AP78L05
08 : AP78L08
12 : AP78L12
(2) SO-8 ( Top View )
AP78L XX
YY WW
XX
Logo
Part Number
5
8
41
WW : Week : 01~52; 52
YY : Year : 08, 09,10~
G : Green
X : Internal Code
represents 52 and 53 week
05 : AP78L05
08 : AP78L08
12 : AP78L12
(3) SOT89
1 32
X X
Y W
XX : Identification code
( Top View )
X
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
X : Internal code
A~Z : Green
a~z : 27~52 week;
z represents 52 and 53 week
Device Package Identification Code
AP78L05 SOT89 V2
AP78L08 SOT89 V3
AP78L12 SOT89 V4
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 13 of 16
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Package Outline Dimensions (All Dimensions in mm)
(1) Package Type: TO92
(2) TO92 for Ammo pack
TO92-3L
Dim Min Max Typ
A 3.45 3.66 -
B 4.27 4.78 -
b - - 0.38
c - - 0.38
D - - 3.87
E 4.32 4.83
e - - 1.27
e2 2.40 2.90 -
L 12.98 15.00 -
L1 12.80 15.00 -
L2 0.80 - -
L3 2.00 3.00 -
N 1.22 1.37 -
All Dimensions in mm
EJECTION
MARK
LOOSE PRODUCT TAPED PRODUCT
EJECTION
MARK
B
E
b
e
e
D
N
ce2 e2
L1
E
L2 L3
A
AP78L05/08/12
AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS
AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 14 of 16
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Package Outline Dimensions (cont.) (All Dimensions in mm)
(3) Package Type: SO-8
(4) Package Type: SOT89
SO-8
Dim Min Max
A - 1.75
A1 0.10 0.20
A2 1.30 1.50
A3 0.15 0.25
b 0.3 0.5
D 4.85 4.95
E 5.90 6.10
E1 3.85 3.95
e 1.27 Typ
h - 0.35
L 0.62 0.82
θ 0° 8°
All Dimensions in mm
SOT89
Dim Min Max
A 1.40 1.60
B 0.44 0.62
B1 0.35 0.54
C 0.35 0.43
D 4.40 4.60
D1 1.52 1.83
E 2.29 2.60
e 1.50 Typ
e1 3.00 Typ
H 3.94 4.25
L 0.89 1.20
All Dimensions in mm
e
D
H
L
A
C
E
8° (4X)
B1
B
D1
R0.200
e1
Gauge Plane
Seating Plane
Det ail ‘A’
Det ail ‘A’
E
E1
h
L
D
eb
A2
A1
A
45
°
7
°~
9
°
A3
0.254
AP78L05/08/12
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AP78L05/08/12
Document number: DS31054 Rev. 10 - 2 15 of 16
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Suggested Pad Layout (All Dimensions in mm)
(1) Package Type: SO-8
(2) Package Ty pe: SOT89
Dimensions Value (in mm)
X 0.60
Y 1.55
C1 5.4
C2 1.27
Dimensions Value (in mm)
X 0.900
X1 1.733
X2 0.416
Y 1.300
Y1 4.600
Y2 1.475
Y3 0.950
Y4 1.125
C 1.500
X
C1
C2
Y
Y1
X1
Y2
Y
C
X (3 x)
Y3 Y4
X2 (2x)
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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 i ntended 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 expect ed t o result in significant i njury to the user.
B. A critical component is any component in a life support devic e or system whose failure t o perform can be reasonably expected
to cause the failure of the life support devic e or to aff ect its safety or effectiveness.
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