AP431 Diodes Inc, AP431 Datasheet - Page 9

• Manufacturer Part Number: AP431
• Description: Voltage & Current References 2.495V - 36V 250mA
• Manufacturer: Diodes Inc

Specifications of AP431

• Product: Voltage References
• Topology: Shunt References
• Output Voltage: +/- 1 %
• Initial Accuracy: 1 %
• Average Temperature Coefficient (typ): 30 PPM / C
• Series Vref - Input Voltage (max): 36 V
• Shunt Current (max): 200 mA
• Maximum Operating Temperature: + 85 C
• Package / Case: SOP-8
• Input Voltage: 20 V
• Minimum Operating Temperature: - 20 C
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application Examples
AP431/AP431A
Document number: DS31002 Rev. 15 - 2
V
IN
V
Fig. 7 Constant-Current
IN
LED on when Low Limit < V
Low Limit ≈ V
High Limit ≈ V
R1A
R2A
I
OUT
Fig. 4 Voltage
Sink
= V
Monitor
REF
REF
REF
(1+R1B/R2B)
(1+R1A/R2A)
/ R
R1B
S
R2B
I
OUT
R
IN
S
<
High Limit
V
IN
V
R1A
R2A
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
IN
High Limit
Low Limit
Fig. 8 Higher-Current Shunt
R
R
1
2
V
Delay = RC x ln (
V
R1B
OFF
OUT
IN
= (1 + R1/R2) x V
V
V
Regulator
REF
Fig. 5 Delay
REF
R2B
R
O
www.diodes.com
N
Timer
(1 + R1A/R2A)
(1 + R1B/R2B) +V
ADJUSTABLE PRECISION SHUNT REGULATOR
+
9 of 16
V
IN
+
REF
V
-V
IN
REF
V
OUT
)
BE
V
V
IN
V
BE
IN
Low Limit <
Fig. 6 Current Limiter or Current
PULSE
Output ON when
R
1
R
2
V
L
I
IN
IMIT
OUT
Fig. 9 Crow Bar
< High Limit
Source
AP431/AP431A
= V
REF
(1 + R1/R2) x V
/ R
CL
R
CL
REF
I
OUT
V
OUT
© Diodes Incorporated
June 2010