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CP432
Adjustable Precision Shunt Regulator
Features
- Precision reference voltage CP432 : 1.24V 1% CP432A : 1.24V 0.5% - Sink current capability: 200mA. - Minimum cathode current for regulation: 150A - Equivalent full-range temp coefficient: 30 ppm/oC - Fast turn-on Response. - Low dynamic output impedance: 0.2 - Programmable output voltage to 20v - Low output noise - Packages: SOT89, SOT23, TO92
General Description
The CP432/432A are 3-terminal adjustable precision shunt regulators with guaranteed stable temperature over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 1.24\/ (VREF) up to 20V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.2. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for Zener diodes in many applications. The precise +/- 1% reference voltage tolerance of the CP432/432A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it.
Typical Application Circuit
VIN VOUT
+
Cin CP432
R1
+
Cout
R2
VOUT = (1+R1/R2)VREF Precision Regulator
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 1 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
Block Diagram
REF (R) + Cathode (C) VREF
Symbol
Cathode (C)
1.24V
REF (R)
Anode (A)
Anode (A)
Pin Configuration
Order Number
Pin Configuration (Top View)
Order Number
Pin Configuration (Top View)
CP432Y CP432AY (SOT89)
3 Cathode 2 Anode 1 REF
CP432R CP432AR (SOT23)
3 REF Anode 1 2 Cathode
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 2 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
+ +
CP432V CP432AV (TO92)
3 Cathode 2 Anode 1 REF
+
CP432W CP432AW (SOT23)
3 Cathode Anode 1 2 REF
CP432
Adjustable Precision Shunt Regulator
Absolute Maximum Ratings
Cathode voltage ..........................................................................................................................20V Continuous cathode current ......................................................................................... -10mA ~ 250mA Reference input current range ..................................................................................................... 10mA Operating temperature range (CP432) ........................................................................... -20oC ~ 85oC o (CP432I)................................................................................ -40 C~85oC Lead Temperature.................................................................................................................... 260oC Storage Temperature ...................................................................................................... -65oC ~ 150oC Power Dissipation (Notes 1. 2) SOT89 ..................................................................... 0. 80W TO92 ............................................................... ..... 0.78W SOT23. .................................................................. 0.23W Note 1: TJ, max =150oC. . Note 2: Ratings apply to ambient temperature at 25oC.
Electrical Characteristics (Ta=25oC, unless otherwise specified.)
Test conditions VKA = Vref, CP432 Reference voltage I KA = 10mA CP432A (Fig.1) Deviation of reference input voltage VKA = VREF , IKA = 10mA , over temperature (Note 3) Ta = full range (Fig.1) Ratio of the change in reference IKA = 10mA voltage to the change in cathode VKA = 20 ~VREF (Fig.2) voltage R1 = 10K,R2 = Reference input current IKA= 10mA (Fig.2) R1 = 10K,R2 = Deviation of reference input current IKA = 10mA over temperature Ta = Full range (Fig.2) Minimum cathode current for VKA = VREF (Fig.1) regulation Off-state current VKA = 20V , VREF = 0V (Fig.3) V KA = VREF Dynamic output impedance (Note 4) IKA = 0.1mA ~ 15mA Frequency 1KHz (Fig.1) Parameter Symbol VREF VREF
VREF V
KA
Min. 1.227 1.233
Typ. 1.24 3.0 -1.4 1.4 0.4 0.15 0.1 0.2
Max. 1.252 1.246 20 -2.0 3.5 1.2 0.3 1.0 0.5
Unit V mV mV/V A A mA A
IREF IREF IKA(min) IKA(off)
Z KA
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 3 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
VMAX VDEV = VMAX - VMIN VMIN
TI
TEMPERATURE
T2
Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full temperature range. The average temperature coefficient of the reference input voltage VREF is defined as:
( VDEV VREF (25C) ) x 10
6
VREF =
T2 - T1
.............................................. ( ppm
C
)
Where: T2 - T1 = full temperature change. VREF can be positive or negative depending on whether the slope is positive or negative. Note 4. The dynamic output impedance, RZ, is defined as: V KA Z KA = I KA When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall circuit, is defined as:
' v ZKA = ZKA i (1 + R1 ) R2
Test Circuits
Input IN IN
VKA IKA R1 VREF IREF VREF
IKA VKA
VKA
R2
IZ(OFF)
V KA = V REF (1 +
Fig1. Test Circuit for V KA= VREF
R1 ) + IREF R1 R2
Fig3. Test Circuit for off-state Current
Fig2. Test circuit for V KAVREF
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 4 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY
60
AV -Small Signal Voltage Amplification (dB)
50 40 30 20 10 0 1K 10K
IKA=10mA TA=25oC 15K 9F
Output IKA 232
+ 8.25K -
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
f-Frequency-Hz
100K
1M
10M
REFERENCE IMPEDANCE vs. FREQUENCY
100
ZKA--Reference Impedance --
IKA=10mA TA=25oC
10
50 +
1
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1 1K 10K 100K 1M 10M
f-Frequency-Hz
STABILITY BOUNDARY CONDITIONS
100 90 80 IKA-Cathode Current-m A 70 60 50 40 30 20 10 0 0.001 0.01 0.1 1 C L-Load Capacitance-F 10
CL R2
A VKA=Vref B VKA=5V C VKA=10V D VKA=15V B
TA=25 oC
Stable
CL
Stable A
C
TEST CIRCUIT FOR CURVE A
D
R1=10KO
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial V KA and I KA conditions with CL =0.V BATT and CL were then adjusted to determine the ranges of stability.
TEST CIRCUIT FOR CURVE B, C, AND D
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 5 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
1K
150O I KA + I KA
+
GND
Output I KA
GND
VBATT
150O
+ -
VBATT
CP432
Adjustable Precision Shunt Regulator
Application Examples
VIN RCL R R1A R1B VIN IOUT
V IN
ON R2A R2B OFF
+
LED on when Low LimitVINHigh Limit Low Limit VREF (1+R1B/R2B) High Limit VREF (1+R1A/R2A)
V IN Delay = RC x ln( ) VIN -VREF
IOUT = VREF / RCL
Fig.4 Voltage Monitor
Fig.5 Delay Timer
Fig.6 Current Limiter or Current Source
VIN
IOUT
VIN
VOUT
VIN
PUSE R1
VOUT
R1
RS
R2
R2
IOUT = VREF / RS
VOUT = (1 + R1/R2) x VREF
LIMIT
(1 + R1/R2) x VREF
Fig.7 Constant-Current Sink
Fig.8 Higher-Current Shunt Regulator
Fig.9 Crow Bar
VIN R1A R1B Output ON when Low Limint VINHigh Limit
+
R2A
R2B
VBE
Low Limit High Limit
VREF(1 + R1B/R2B) +VBE VREF(1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 6 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
Package Diagrams
(1) SOT89-3L Package Outline Dimension
D1
E e1 e 50(2x) 8 (2x) D c A b b1 b
0
Symbol A b b1 C D D1 e e1 E HE L
Dimensions In Millimeters Min. 1.40 0.36 0.41 0.35 4.40 1.40 2.90 1.45 2.40 3.94 0.80 Nom. 1.50 0.42 0.47 0.39 4.50 1.60 3.00 1.50 2.50 Max. 1.60 0.48 0.53 0.43 4.60 1.75 3.10 1.55 2.60 4.25 1.20
L
HE
Dimensions In Inches Min. 0.055 0.014 0.016 0.014 0.173 0.055 0.114 0.057 0.094 0.155 0.031 Nom. 0.059 0.016 0.043 0.015 0.177 0.062 0.118 0.059 0.098 Max. 0.063 0.018 0.051 0.017 0.181 0.069 0.122 0.061 0.102 0.167 0.047
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 7 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
(2) TO92-3L Package Outline Dimension
A1 A b1 D b e b
E
L
Symbol A A1 b b1 D E L e
Dimensions In Millimeters Min. Nom. Max. 3.302 3.556 3.810 1.016 0.330 0.381 0.432 0.406 0.457 0.506 4.445 4.572 4.699 4.445 4.572 4.699 13.00 15.500 1.150 1.270 1.390
Dimensions In Inches Min. Nom. Max. 0.130 0.140 0.150 0.040 0.013 0.015 0.017 0.016 0.018 0.020 0.175 0.180 0.185 0.175 0.180 0.185 0.512 0.610 0.045 0.050 0.055
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 8 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
CP432
Adjustable Precision Shunt Regulator
(4) SOT23-3L Package Outline Dimension
2
1
3 e
D
A2
A
b
Symbol A A1 A2 b C D E e HE L
Dimensions In Millimeters Min. 1.00 0.00 1.00 0.35 0.10 2.70 1.40 1.70 2.40 0.35 Nom. 1.20 1.15 0.175 2.90 1.60 2.00 2.70 0.45 Max. 1.40 0.10 1.30 0.50 0.25 3.10 1.80 2.30 3.00 0.55
A1
C
L
Dimensions In Inches Min. 0.039 0.000 0.039 0.014 0.004 0.106 0.055 0.067 0.094 0.014 Nom. 0.047 0.045 0.007 0.114 0.063 0.079 0.106 0.018 Max. 0.055 0.004 0.051 0.020 0.010 0.122 0.071 0.091 0.118 0.022
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 9 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052
HE
E
CP432
Adjustable Precision Shunt Regulator
1/2 Taping Specifications For TO-92 package
SYMBOL P P0 P1 H H1 H2 H3 H4 F W W1 W2 D0 E
SPECIFICATIONS (mm) 12.7 1.0 12.7 1.0 3.81 0.4 21.0~26.0 17.0~21.0 14.0~18.0 3.4 max. 2.5 min. 5.08 0.2 18.0 0.5 9.0 0.5 6.0 0.5 4.0 0.2 0.5 max.
SPECIFICATIONS (inch) 0.50 0.07 0.50 0.07 0.15 0.016 0.828~1.024 0.669~0.828 0.551~0.709 0.125 max. 0.098 min. 0.2 0.008 0.708 0.020 0.354 0.020 0.236 0.020 0.157 0.008 0.020 max.
* All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Email: server@ceramate.com.tw Tel:886-3-3214525 Http: www.ceramate.com.tw Page 10 of 10 Rev 1.1 Jan. 19,2005 Fax:886-3-3521052

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