查询APL1431供应商
APL1431
Adjustable Precision Shunt Regulator
Features General Description
••
•
Precise Reference Voltage to 2.500V
••
••
•
Guaranteed 0.5% or 1% Reference Voltage
••
Tolerance
••
•
Sink Current Capability , 1mA to 100mA
••
••
•
Quick Turn-on
••
••
•
Adjustable Output Voltage , VO = V
••
••
• Low Operational Cathode Current , 250µA
••
to 20V
REF
Typical
••
• 0.1Ω Typical Output Impedance
••
••
• SOT-23 , SOT-89 and TO-92 Packages
••
Applications
••
• Linear Regulators
••
••
• Adjustable Power Supply
••
••
• Switching Power Supply
••
The APL1431 is a 3-terminal adjustable voltage reference with specified thermal stability over applicable
commercial temperature ranges. Output voltage may
be set to any value between V
(2.5 V) and 20 V with
ref
two external resistors (see Figure 2). When used
with an photocoupler, the APL1431 is an ideal voltage reference in isolated feedback circuits for 2.5V
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 APL1431 excellent replacements for zener diodes in many applications, including on-board regulation and adjustable power
supplies.
ANODE
3
12
CATHODE
REF
SOT-23 (Top View)
Symbol
REF
CathodeAnode
Functional Diagram
Cathode
REF
+
_
ref
V
123
REFANODECATHODE
SOT-89 (Top View)
REF
1
2
ANODE
CATHODE
3
TO-92 (Top View)
Anode
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. A.3 - May., 2003
www.anpec.com.tw1
APL1431
Ordering and Marking Information
Elec. Grade
APL1431
APL1431 A :
Handling Code
Temp. Range
Package Code
Elec. Grade
1431
A : 0.5% Reference Voltage Tolerance
B : 1% R eference Voltage Tolerance
Package Code
A : S O T -23 D : S O T-8 9 E : TO-92
Y : C hip Fo rm
Temp. Range
C : 0 to 70 C I : -40 to 85 C
Handling Code
PB : P lastic B ag TB : Tape & Box
TR : Ta pe & Reel
APL1431 E :
°
APL
1431
XXXXX
°
XXXXX - Date Code
APL1431 D :
APL1431
XXXXX
XXXXX
- Date Code
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
KA
I
K
I
REF
θ
JA
T
A
T
j
T
STG
T
SOL
Cathode voltage
Continuous cathode current range
Reference current range
Thermal Resistance from Junction to Ambient in Free Air
SOT-23
SOT-89
TO-92
Ambient temperature range APL1431XXC
APL1431XXI
Junction temperature range APL1431XXC
APL1431XXI
Storage Temperature Range
Lead temperature range, Ts (Soldering, 10sec)
20 V
120 mA
3mA
416
250
250
0 to 70
-40 to 85
0 to 150
-40 to 150
-65 to 150
260
C/W
°
°
°
°
°
C
C
C
C
Electrical Characteristics
TA= 25°C ( unless otherwise noted)
Symbol Parameter Test Conditions
V
V
REF
/T
V
∆
REF
Reference voltage
Reference voltage
drift over temp. range
KA=VREF
I
=10mA
K
V
KA=VREF
T
A
,
*1
, IK=10mA
= 0 to 70°C
TA= -40 to 85°C
/ ∆V
V
∆
REF
Copyright ANPEC Electronics Corp.
Rev. A.3 - May., 2003
Voltage ratio (open
KA
loop gain)
IK=10mA, VKA=V
I
=10mA, VKA=V
K
APL1431
Min. Typ. Max.
APL431A 2.487 2.500 2.513
APL431B 2.475 2.500 2.525
*1
*1
to 10V
REF
to 20V
REF
*2
*2
-1.5 -3
-1.2 -2.5
Unit
V
20
mV
30
mV/V
www.anpec.com.tw2
APL1431
Electrical Characteristics Cont. T
Symbol Parameter Test Conditions
=10mA,
I
K
R
=10kΩ, R2=open
1
I
=10mA, R1=10kΩ,
K
R
=open, TA= -40 to 85°C
2
V
KA
V
KA=VREF
*1
REF
= 20V, V
REF
= 0V
IK=1mA to 100mA, f ≤1kHz
+ 50mV
REF
∆
I
REF
I
REF
I
K(min)
I
K(off)
/T
Reference current
Reference current
drift
Min. cathode current VKA=V
Off-state cathode
current
|ZKA| Dynamic impedance
I
K
Cathode current VKA=V
Notes : *1 : use Figure 1
*2 : use Figure 2
*3 : use Figure 3
Test figures
= 25°C ( unless otherwise noted)
A
APL1431
Min. Typ. Max.
*2
*2
1.0 3
0.3 1
0.25 0.5 mA
*3
*1
*2
0.1 1
0.1 0.4
Unit
µ
µ
µ
Ω
100 mA
A
A
A
IN
V
REF
V
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
K
I
, VO=VKA=V
REF
I
K
,
REF
REF
V
o
V
× R
V
o
REF
V
IN
Figure 3. Test Circuit for I
K(off)
I
K(off)
Application schematic
o
1
∗ R
should provide cathode current large than
b
1mA to maintain APL431 work properly.
5-Volt Precision Regulator
V
IN
b
R
27.5k
0.1%
27.5k
0.1%
o
V
Ω
Ω
Copyright ANPEC Electronics Corp.
Rev. A.3 - May., 2003
www.anpec.com.tw3
APL1431
Typical Characteristics
Reference Current vs.Temperature
125
100
75
Reference Current -µA
50
-40 -20 0 20 40 60 80
Temperature - C
°
100
Cathode Current vs. Cathode Voltage
800
600
400
I
K-MIN
200
Cathode Current -µA
0
-200
-1 0 1 2 3
Cathode Voltage (V)
Cathode Current vs. Cathode Voltage
100
50
0
Cathode Current -mA
-50
-100
-1 0 1 2 3
Cathode Voltage -V
Reference Voltage vs. Temperature
2.52
2.515
2.51
2.505
2.5
2.495
2.49
2.485
Reference Voltage -V
2.48
2.475
2.47
-40
-20
20 40 60 80 100
0
Temperature ( C)
°
Copyright ANPEC Electronics Corp.
Rev. A.3 - May., 2003
www.anpec.com.tw4
Loading...