ANPEC APL431LBYI-TR, APL431LBYI-TB, APL431LBYC-TR, APL431LBYC-TB, APL431LBYC-PB Datasheet
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APL431L
Low Voltage Adjustable Precision Shunt Regulator
Features General Description
••
•
Precise Reference Voltage to 1.24V
••
••
•
Guaranteed 0.5% or 1% Reference Voltage
••
Tolerance
••
•
Sink Current Capability, 80uA to 100mA
••
••
•
Quick Turn-on
••
••
•
Adjustable Output Voltage, VO = V
••
••
• Low Operational Cathode Current, 80µA
••
to 20V
REF
Typical
••
• 0.1Ω Typical Output Impedance
••
••
• SOT-23-3, SOT-23-5, TO-92 and SOT-89
••
Packages
Applications
••
• Linear Regulators
••
••
• Adjustable Power Supply
••
••
• Switching Power Supply
••
The APL431L is a 3-terminal low voltage adjustable
precision reference with specified thermal stability
over applicable commercial temperature ranges. Output voltage may be set to any value between V
(1.
ref
24 V) and 20 V with two external resistors (see Figure 2). When used with an photocoupler, the
APL431L is an ideal voltage reference in isolated feedback circuits for 3V to 12V switching-mode power
supplies. This device has a typical output impedance of 0.1Ω. Active output circuitry provides a very
sharp turn-on characteristic, making the APL431L excellent replacements for zener diodes in many
applications, including on-board regulation and adjustable power supplies.
ANODE
3
12
REF
CATHODE
SOT-23-3 (Top View)
CATHODE3
ANODE
2
1
REF
REF
SOT-23-5 (Top View)
123
REF ANODE CATHODE
NC
NC
45
123
ANODE
CATHODE
Symbol
REF
CathodeAnode
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp.
Rev. B.7 - May., 2003
TO-92 (Top View)
Functional Diagram
Cathode
REF
+
_
ref
V
Anode
SOT-89 (Top View)
www.anpec.com.tw1
APL431L
Ordering and Marking Information
APL431L
APL431L A/B :
APL431L D :
431L
APL431L
XXXXX
XXXXX
Handling Code
Temp. Range
Package Code
Elec. Grade
- Date Code
Elec. Grade
A : 0.5% Reference Voltage Tolerance
B : 1% Reference Voltage Tolerance
Package Code
A : SO T-23-3 B : SO T-23-5
D : SO T-89 E : TO -92
Y:Chip Form
Temp. Range
C : 0 to 70 C I : -40 to 85 C
Handling Code
PB : Plastic Bag TB : Tap e & Box
TR : Ta pe & Re el
APL431L E :
°
APL
431L
XXXXX
°
XXXXX - Date Code
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
KA
I
K
I
REF
θ
JA
T
J
T
STG
T
SOL
Cathode voltage
Continuous cathode current range
Reference current range
20 V
100 mA
3mA
Thermal Resistance from Junction to Ambient in Free Air
SOT-23-3
SOT-23-5
SOT-89
TO-92
416
357
250
250
Operating Junction Temperature Range -40 to 150
Storage Temperature Range
Lead temperature range, Ts (Soldering, 10sec)
-65 to 150
260
C/W
°
°
°
°
C
C
C
Copyright ANPEC Electronics Corp.
Rev. B.7 - May., 2003
www.anpec.com.tw2
APL431L
Electrical Characteristics T
= 25°C ( unless otherwise noted)
A
Symbol Parameter Test Conditions
VKA=V
V
REF
Reference voltage
T
T
A
, IK=10mA
REF
=25°C, (Fig. 1) APL431LB
A
=full range(see
Note1), (Fig.1)
V
DEF
/ ∆V
V
∆
REF
V
Temp Deviation TA =full range (see Note1)
DEF
Ratio of Change in V
to Change in Cathods
KA
, IK=10mA (Fig. 1)
REF
V
KA=VREF
IK=10mA, VKA=16V to V
Votag e
I
REF
I
REF(DEV)
Reference Input Current
I
Tem p D e vi a ti o n
REF
I
=10mA,R1 =10kΩ,R2 =∞ (Fig. 2)
K
=full range (see Note 1),
T
K
=10kΩ, R2=
R
1
,
IK=10mA,
∞
(Fig. 2)
I
K(off)
Z
I
K(MIN)
KA
off-state cathode current V
Dynamic Output
Impedance
Minimum Operating
Current
=0V, (Fig. 3)
REF
V
KA=VREF
, IK=1mA to 100mA,
f ≤1kHz (Fig. 1)
V
KA=VREF
(Fig. 1) 80 100
APL431L
Min. Typ. Max.
APL431LA 1.234 1.240 1.246
1.228 1.240 1.252
APL431LA 1.222 1.240 1.258
APL431LB 1.215 1.240 1.265
515
(Fig. 2) -0.2 -1.0 mV/V
REF
0.15 0.5
0.05 0.3
VK=6V 0.01 0.1
=16V 0.01 0.5
V
K
0.1 0.4
Unit
V
mV
A
µ
A
µ
A
µ
Ω
A
µ
Notes : 1.Full temperature range is 0°C to 70°C for APL431LXXC,and -40°C to 85°C for APL431LXXl.
Copyright ANPEC Electronics Corp.
Rev. B.7 - May., 2003
www.anpec.com.tw3
APL431L
Test figures
IN
V
REF
V
o
V
K
I
V
IN
I
K(off)
V
o
Figure 1. Test Circuit for VKA=V
V
IN
R1
R2
I
REF
REF
V
Figure 2. Test Circuit for VKA>V
VO= VKA= V
× (1+R1/R2) + I
REF
, VO=VKA=V
REF
I
K
,
REF
REF
V
o
× R
REF
1
Figure 3. Test Circuit for I
K(off)
Copyright ANPEC Electronics Corp.
Rev. B.7 - May., 2003
www.anpec.com.tw4
APL431L
Application Schematic
Precision Voltage Reference
IN
V
Precision High-Current Series Regulator
V
IN
B
R
1
R
REF
V
2
R
0.1µ F
o
V
V
o
R
Notes for Application Circuits:
B
0.1µF
R
1
V
REF
R
2
1)To improve the stability of output voltage, a 0.1µF capacitor between cathode and anode of APL431L is
strongly recommended.
2)Set VOUT according to the following equation:
VOUT = VREF(1+R1/R2)+lREF R1
3)Choose the value for RB as follows:
A)The maximum limit for RB should be such that the cathode current(lK) is greater than the minimum op erating current (80µA) at VIN(MIN).
B)The minimum limit for RB should be such that the cathode current (lK) does not exceed 100mA under
all load conditions, and the instantaneous turn-on value for lk does not exceed 150mA. Both of the fo llowing conditions must. be met:
VIN(MAX)
RB,Min≥
150mA
VIN(MAX)-VOUT
RB,Min≥
lOUT(MIN)+100mA
(to limit instantaneous turn-on lK)
(to limit lK under normal operating conditions)
Copyright ANPEC Electronics Corp.
Rev. B.7 - May., 2003
www.anpec.com.tw5
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