Datasheet ZR431 (Diodes) - 6

ZR431 ADJUSTABLE PRECISION ZENER SHUNT REGULATOR Application Characteristics
V+

V V+ OUT

VOUT

R1

R1

V

REF
N
V

REF
O
R2 R2
ATI RM O
⎛ 1 R ⎞ ⎛ 1 R ⎞
F
V = ⎜1 OUT + ⎟ VREF

V = ⎜1 OUT + ⎟ VREF
N
⎝ R2 ⎠ ⎝ R2 ⎠
SHUNT REGULATOR HIGHER CURRENT SHUNT REGULATOR CE I
V+ ZSR*** V+ VOUT IN OUT
ADVAN
30Ω Common R1 0.01µF VREF R1 R2 V V REF OUT R2

VOUT(MIN) = VREF + VREG

⎛ 1 R ⎞ V = ⎜1 ⎛ ⎞ OUT + ⎟ VREF

1 R ⎝ R2 ⎠ V = ⎜1 OUT + ⎟ VREF

⎝ R2 ⎠
OUTPUT CONTROL OF A THREE TERMINAL SERIES REGULATOR FIXED REGULATOR
V+ V+

R1A R1B

OUTPUT

VREF OUTPUT INPUT

VREF

V ≈ 2V ON

V = V+

OFF R2A R2B

V = 2.5V TH

⎛ B 1 R ⎞ Low lim it + ⎜1+ ⎟

VREF ⎝ R B 2 ⎠
SINGLE SUPPLY COMPARATOR WITH
⎛ A 1 R ⎞
TEMPERATURE COMPENSATED THRESHOLD
Highlimit + ⎜1+ ⎟ VREF

⎝ R2A ⎠
OVER VOLTAGE/UNDER VOLTAGE PROTECTION CIRCUIT
ZR431 6 of 9 October 2011 Document number: DS33255 Rev. 6 - 2
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