CAT102TDI-GT3 [ONSEMI]
Voltage Reference, 600 mV;
| 型号： | CAT102TDI-GT3 |
| 厂家： | 
ONSEMI |
| 描述： | Voltage Reference, 600 mV 光电二极管 |
| 文件： | 总9页 (文件大小：171K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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CAT102
Precision, Adjustable Shunt Regulator
(600 mV Reference)
FEATURES
DESCRIPTION
The CAT102 is a low-voltage reference and amplifier.
Designed for the control loop of low-voltage power
supplies, the reference voltage has been designed for
600 mV. Over a temperature from -40°C to 85°C, the
reference voltage is within 8 mV of the nominal
600mV. In addition, the error amplifier output and the
supply voltage pin (IN) are on separate pins.
600 mV low voltage reference
±6 mV initial accuracy
High PSRR: 45 dB at 300 kHz
Better line regulation: 1 mV (VIN from 2.2 V to 18 V)
Low supply current: 90 µA
Open drain output
Power supply rejection is a high 45 dB at 300 kHz.
The output, OUT, can sink 20 mA at a maximum
saturation voltage of 250 mV.
Directly drives optocouplers
Industrial temperature range of -40ºC to 85ºC
RoHS-compliant 5-lead TSOT23 package
When combined with an optocoupler, the CAT102 can
be used as an error amplifier that controls the
feedback loop in isolated low-output voltage switching
power supplies.
APPLICATION
SMPS control loop
Low temperature coefficient voltage reference
Power management
Replaces zener diodes
Isolated DC-to-DC converters
Network, telecom and cellular base station
Adjustable voltage reference
For Ordering Information details, see page 7.
PIN CONFIGURATION
FUNCTIONAL DIAGRAM
TSOT-23 5L
Top View
IN
OUT
3
5
FB 1 1
GND 2 2
OUT 4 3
5
8 IN
Error
Amplifier
1
FB
+
–
4
5 NC
V
REF
+
–
PIN DESCRIPTION
600mV
Pin Name Function
FB
Inverting input to error amplifier
Ground
2
GND
GND
Output of error amplifier. Source & sink
current capability is 20 mA.
OUT
NC
IN
No connection
Positive supply
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
1
Doc. No. MD-4007 Rev. P
CAT102
ABSOLUTE MAXIMUM RATINGS (1)
Parameters
Ratings
Units
V
VIN Voltage
20
20
OUT Voltage
V
FB Voltage
20
V
VIN, OUT, FB Current
Operating Junction Temperature (10 seconds)
Lead Soldering Temperature (10 seconds)
Storage Temperature Range
50
mA
ºC
ºC
ºC
150
260
-65 to +150
ELECTRICAL CHARACTERISTICS
Electrical characteristics are guaranteed over the full operating temperature range of -40°C to +85°C unless
otherwise specified. Ambient temperature must be de-rated based upon power dissipation and package thermal
characteristics.1 Unless otherwise stated, test conditions are VIN = 3 V, FB = OUT, IOUT = 1 mA.
Symbol
VIN
Parameter
Conditions
Min
Typ
Max
18
Units
V
Supply Voltage Range
Quiescent Supply Current
2.2
IIN
VOUT =1 V
90
500
606
608
µA
TJ = 25ºC
594
592
600
VFB
FB Threshold Reference Voltage
Line Regulation
mV
mV
-40ºC < TJ < 85ºC
VIN = 2.2 V to VIN =18 V
VOUT = 0.6 V
0.5
3
1
IOUT = 1 mA to 10 mA
Load Regulation
FB Input Current
8
mV
nA
dB
VOUT = 0.6 V
IFB
-500
35
500
Reference Power Supply
Rejection
PSRR (3)
Frequency = 300 kHz
65
AV
BW (3)
Error Amplifier Open Loop Gain
Unity Gain Frequency
IOUT = 2 mA, VOUT = 1 V
IOUT = 2 mA, VOUT = 1 V
IOUT = 20 mA, VFB = HIGH
IOUT = 1 mA to 20 mA
VOUT = 16 V, VFB = 0
VOUT = 0.3 V
60
1
80
2
dB
MHz
mV
VOUT
Output Saturation voltage
130
2.5
0.5
250
2
TRANSC (3) Output Transconductance
mA/mV
µA
ILEAK
Output Leakage Current
Maximum Output Current
IOUT(MAX)
20
mA
Notes:
(1)
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolongued time periods
may affect device reliability. All voltages are with respect to ground.
(2) Thermal Characteristics (Θ ) of TSOT-23 5-lead: 255°C/W
JA
(3) This parameter is controlled by design and verified during product evaluation. It is not production tested.
Doc. No. MD-4007 Rev. P
2
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT102
TYPICAL PERFORMANCE CHARACTERISTICS
Line Regulation (at 1mA)
Load Regulation
0.4
6
5
4
0.35
0.3
0.25
0.2
3
2
1
0
0.15
0.1
0.05
0
2
6
10
14
18
1
5
10
15
20
Supply Voltage (V)
Load Current (mA)
Supply current vs. Input Voltage
Power-Supply Rejection Ratio vs. Frequency
-50
-55
-60
-65
-70
-75
-80
-85
-90
-95
-100
92
90
88
86
84
82
80
78
0
5
10
15
20
0.1
1
10
100
1000 10000 100000
Input Voltage (V)
Frequency (Hz)
Gain vs. Frequency
Reference Voltage
110
90
630
620
610
600
590
580
570
70
50
30
10
-10
0.01 0.1
1
10
100
1000 10000
-40
0
40
80
120
Junction Temperature (ºC)
Frequency (kHz)
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
3
Doc. No. MD-4007 Rev. P
CAT102
APPLICATIONS INFORMATION
The CAT102 adjustable shunt regulator features
isolated supply inputs and outputs, ideal for isolated
power-supply applications using an optocoupler in
the feedback path. The CAT102 sinks 20 mA with
VOUT at 0.3 V. The wide input supply range allows
the device to operate from 2.2 V to 18 V. The
CAT102 compares the FB input to a precision
600mV reference. If the FB input is low, the OUT pin
sinks no current. If FB rises above 600 mV, the OUT
pin sinks up to 20 mA.
The current limit can be adjusted by using a resistor R3
connected between the IN and OUT pins. For example,
a 3.3 V supply VIN is associated with R3 = 135 Ω, and a
10 V supply works best with R3 = 470 Ω. The CAT102
shunt regulator is limited to low-current applications with
the OUT pin capable of sinking up to 20 mA max.
Figure 1 shows the CAT102 configured as a shunt
regulator. To generate an output voltage of 0.6 V,
the FB pin has to be directly connected to the OUT
pin. A 1.0 µF capacitor from OUT to GND is
recommended when the output voltage is 0.6 V. A
resistor-divider connected from OUT to GND is used
to produce a higher output voltage as set by the
following equation:
VOUT = (1 + R1/R2) x 0.6 V
Figure 1. Application circuits for 0.6 V output and 1.2 V output voltages
R
3
V
IN
V
OUT
3.3V
0.6V/20mA
5
2
3
1
IN
OUT
FB
C
C
2
1
CAT102
0.1µF
1µF
GND
R
3
V
IN
V
= (1 + R /R ) x 0.6V
1 2
OUT
3.3V
1.2V/20mA
5
2
3
1
IN
OUT
FB
C
C
2
1
R
1
CAT102
0.1µF
1µF
10kꢀ
GND
R
2
10kꢀ
Doc. No. MD-4007 Rev. P
4
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT102
TYPICAL APPLICATION
1V regulated
output
V
OUT
V
IN
Regulator
with
Isolation
Opto-isolator
V
CC
> 2.2V
R3
R4
100ꢀ
100kꢀ
5
2
3
IN
OUT
FB
R1
C
C
2
1
22kꢀ
CAT102
0.1µF
1µF
1
GND
R2
33kꢀ
Figure 2. Opto-Feedback Application Circuit
In order to allow proper operation of the optocoupler and the CAT102, the supply voltage VCC must be greater
than 2.2 V.
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
5
Doc. No. MD-4007 Rev. P
CAT102
PACKAGE OUTLINE DRAWING
TSOT-23 5-Lead (TD) (1)
SYMBOL
MIN
NOM
MAX
1.00
0.10
0.90
0.45
0.20
D
A
A1
A2
b
e
0.01
0.80
0.30
0.12
0.05
0.87
c
0.15
D
2.90 BSC
2.80 BSC
1.60 BSC
0.95TYP
0.40
E1
E
E
E1
e
L
0.30
0º
0.50
8º
L1
L2
θ
0.60 REF
0.25 BSC
TOP VIEW
A2 A
A1
θ
L
b
c
L2
L1
SIDE VIEW
END VIEW
Notes:
(1) All dimensions in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-193.
Doc. No. MD-4007 Rev. P
6
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT102
EXAMPLE OF ORDERING INFORMATION 1
Prefix
Device # Suffix
CAT
102
TD
I
- G
T3
Package
TD: TSOT-23
Tape & Reel
T: Tape & Reel
3: 3,000/Reel
Company ID
Lead Finish
G: NiPdAu (PPF)
Product Number
102
Temperature Range
I = Industrial (-40°C to 85°C)
ORDERING PART NUMBER
CAT102TDI-G
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free)
(2) The device used in the above example is a CAT102TDI-GT3 (TSOT-23, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/Reel)
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
7
Doc. No. MD-4007 Rev. P
CAT102
REVISION HISTORY
Date
Rev. Description
29-Jan-07
M
Added Ordering Information
Changed package from SOT-23 to TSOT-23
Updated Features
Updated Functional Diagram
16-Jun-07
N
Updated Electrical Characteristics
Updated Typical Performance Characteristics
Changed termination from SnPb to NiPdAu
Added MD- to document Number
19-Nov-08
05-Feb-09
O
P
Change logo and fine print to ON Semiconductor
Updated Electrical Characteristics Table
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to
any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer
purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and
distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated
with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
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Literature Distribution Center for ON Semiconductor
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Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada
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Email: orderlit@onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
Doc. No. MD-4007 Rev. P
8
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
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