1.24V ADJUSTABLE PRECISION SHUNT REGULATORS Power Management
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GM432
1.24V ADJUSTABLE PRECISION SHUNT REGULATORS
Power Management
GM432's low-voltage three-terminal adjustable precision shunt regulators with specified thermal stability over their full temperature range. Output voltage value from Vref (1.24V) using external resistors. Their active output circuitry provides very sharp turn-on characteristIc, making them excellent replacements zener diodes many applications such onboard regulation adjustable power supplies. home wide range applications, these versatile darlings ideal voltage references 3.0V 3.3V switching power suppies. With operational cathode current 80µA, batteries keep going. Whatever your application, GM432's offer optimum combination performance, reliability, economy.
Features
Low-voltage operation, down 1.24V 0.5%, reference voltage tolerance Adjustable output voltage, Vref Wide operating current range, 80µA 100mA dynamic output impedance, 0.05W typical Wide temperature range, -40°to +85°C Pin-to-pin replacement TLV431, SC431L Available SOT-23, SOT-25, SOT-89, TO-92 SOP-8
Application
Switching power supplies Linear regulators Adjustable supplies Instrumentation Battery-operated computers, PDA's portable devices Monitors, TV's, camcorders Computer disk drives
CATHODE
REFERENCE
REFERENCE
ANODE
CATHODE
1.24V
ANODE
www.gammamicro.com
PRELIMINARY
GM432
Revision Jul. 2004
LOGIC SYMBOL
BLOCK DIAGRAM (POSITIVE LOGIC)
GM432 MARKING INFORMATION CONFIGURATIONS (TOP VIEW)
SOT-25(SOT-23-5)
ANODE
SOT-23
Anode
TO-92
432G AYWW
XXXYW
XXXYW
CATHODE
Cathode
Anode Cathode
SOP-8 (SO-8) SOT-89
ANODE ANODE
GM432G AYWW
CATHODE
GM432G AYWW
CATHODE ANODE ANODE
Specific Device Code Grade Assembly Location Year Work Week
ANODE
ORDERING INFORMATION
Ordering Number Precision Device code
GM432AT92B GM432AT92RL GM432AST23R GM432AST25R GM432AS8R GM432AST89R GM432BT92B GM432BT92RL GM432BST23R GM432BST25R GM432BS8R GM432BST89R GM432CT92B 0.5% 0.5% 0.5% 0.5% 0.5% 0.5%
Grade
Package
TO-92 TO-92 SOT-23 SOT-25 SO-8 SOT-89 TO-92 TO-92 SOT-23 SOT-25 SO-8 SOT-89 TO-92 TO-92 SOT-23 SOT-25 SO-8 SOT-89
Shipping
1,000 Units/ 2,000 Units/ Ammo Pack(Tape) 3,000 Units/Tape &Reel 3,000 Units/Tape &Reel 2,500 Units /Tape Reel 1,000 Units Tape Reel 1,000 Units/ 2,000 Units/ Ammo Pack(Tape) 3,000 Units /Tape &Reel 3,000 Units /Tape &Reel 2,500 Units /Tape Reel 1,000 Units Tape Reel 1,000 Units/ 2,000 Units/ Ammo Pack(Tape) 3,000 Units /Tape &Reel 3,000 Units /Tape &Reel 2,500 Units /Tape Reel 1,000 Units Tape Reel
GM432
GM432CT92RL GM432CST23R GM432CST25R GM432CS8R GM432CST89R
detail Ordering Number identification, please last page.
GM432
ABSOLUTE MAXIMUM RATINGS (over free-air temperature range except noted)
PARAMETER
Cathode Voltage Continuous cathode current Reference input current Power dissipation 25°C SOT-23 SOP-8 TO-92 Package thermal impedance SOT-23 SOT-25 TO-92 SOP-8 Operating ambient temperature range Operating junction temperature range Lead temperature (soldering) seconds
SYMBOL
Iref
VALUE
UNIT
0.37 0.49 0.95
+150
°C/W
TLEAD
These stress ratings only. Functional operation device these conditions beyond "recommended operating conditions" implied. Exposure absolute maximum rated conditions affect device reliability. NOTES:
Voltage values with respect anode except noted. Maximum power dissipation function TJ(max), Maximum allowable power dissipation allowable ambient temperature (TJ(max) TA)/ qJA. Operation absolute maximum 150°C affect device reliability. Package thermal impedance calculated JESD
RECOMMENDED OPERATING CONDITIONS
PARAMETER Cathode Voltage Cathode Current SYMBOL MINIMUM Vref 80µA MAXIMUM UNIT
GM432
GM432
ELECTRICAL CHARACTERISTICS 25°C unless otherwise noted)
GM432A (0.5%) GM432A (0.5%)
PARAMETER Reference Voltage Vref temp deviation Ratio change Vref change Reference input current Deviation reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance Vref CONDITION Vref, 25°C VKA=Vref,IK=10 mA,TA=-40 +85°C(1) 1.234 1.222 1.240 1.246 1.258 UNIT mV/V
Vdev Vref, DVref DVKA Iref 10mA, DVKA Vref 10mA, 10KW,
-1.0 0.15
Iref(dev) 10mA, 10KW, full range IK(min)
0.125 0.135 0.05
0.150 0.150 0.15
IK(off)
Vref 16V, Vref
1kHz,VKA=Vref, IK=100mA 100mA
GM432B (1.0%)
PARAMETER Reference Voltage Vref temp deviation Ratio change Vref change Reference input current Deviation reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance
NOTES: test circuit page test circuit page test circuit page
CONDITION Vref Vref, 25°C VKA=Vref,IK=10 mA,TA= +85°C
1.228 1.215
1.240
1.252 1.258
UNIT mV/V
Vdev Vref, DVref DVKA Iref 10mA, DVKA Vref 10mA, 10KW,
-1.0 0.15
Iref(dev) 10mA, 10KW, full range IK(min) Vref 16V, Vref
0.125 0.135 0.05
0.150 0.150 0.15
IK(off)
GM432
1kHz,VKA=Vref, IK=100mA 100mA
GM432
ELECTRICAL CHARACTERISTICS 25°C unless otherwise noted)
GM432C (2.0%) PARAMETER Reference Voltage Vref temp deviation Ratio change Vref change Reference input current Deviation reference input voltage over full temperature range Minimum operating current Off-state cathode current Dynamic impedance
NOTES: test circuit test circuit test circuit
CONDITION Vref Vdev DVref DVKA Iref Vref, 25°C VKA=Vref,IK=10 mA,TA=-40 +85°C Vref, 10mA, DVKA Vref 10mA, 10KW,
1.215 1.200
1.240
1.265 1.280
UNIT mV/V
-1.0 0.15
10mA, 10KW, Iref(dev) full range IK(min) Vref Vref 16V, Vref
0.125 0.135 0.05
0.150 0.150 0.15
IK(off)
1kHz,VKA=Vref, IK=100mA 100mA
TEST CIRCUITS
Iref Ik(off)
Iref
Test Circuit
Test Circuit
Test Circuit Off-State
GM432
GM432 TYPICAL APPLICATIONS GM432A, GM432B
Vout Vout
Vout=( Vref Vref
Vout=(
Figure Shunt Regulator
Figure High Current Shunt Regulator
7805 Common
Vout
Vout
)Vref
Vout=(1+
Vout=(1+
Vout(min) Vref+ 5.0V
Vref 2.0V
Figure Output Control Three Terminal Fixed Regulator
Vout(min) Vref+
Figure Series Pass Regulator
Iout
Vout
Isink
Isink= Iout= Vref
Figure Constant Current Source
Figure Constant Current Sink
Vout
Vout
GM432
Vout(trip)=(1 Vref
Vout(trip)=(1
Vref
Figure TRIAC Crowbar
Figure Crowbar
GM432
TYPICAL APPLICATION CIRCUIT
Notes: VOUT according following equation: VOUT VREF IREF
GM432
Choose value follows: maximum limit should such that cathode current, greater than minimum operating current (80µA) VIN(MIN)* minimum limit should such that cathode current, does exceed 100mA under load conditions, instantaneous turn-on value does exceed Both following conditions must met: Rmin VIN(max) 150mA limit instantaneous turn-on
Rmin
VIN(max)-VOUT IOUT(min)+100mA
limit under normal operating conditions)
Typical Performance Characteristics
Cathode Current (mA)
=25°C
Cathode current (mA)
-0.5
Cathode Voltage
Cathode Voltage
Figure Cathode Current Cathode Voltage
IREG, Reference Input Current (nA)
Figure Cathode Current Cathode Voltage
1.2440
IREG, Reference Voltage R1=10KW Open
1.2420 1.2400 1.2380 1.2360 1.2340
Junction Temperature
Junction Temperature
Figure Ref. Voltage Junction Temperature
Figure Ref. Input Current Junction Temperature
GM432
GM432
Stability Boundary Conditions
Note About Stability
TA=25°C VKA=Vref
When using GM432 shunt regulator, optimize stability setting either load capacitance across GM432, decouple load; large capacitance across GM432, optional decoupling load. GM432 become unstable with capacitances approximately 10nF
Stable
Cathode Current-mA
when cathode currents less than with instability increasing cathode current reduced. while GM432 happily stable example, cathode current 10mA with 0.1µF capacitor across oscillate transiently cathode curVKA=2V
rent rises through region instability. avoid this problem completely, simply eliminate capacitor select very very high (e.g. 10µF) capac1
VKA=3V
0.001 0.01
itor Since will probably want local decoupling load, best idea capacitance across device. Just resistance capacitance traces vias will prevent local load decoupling from causing transient oscillation dur-
Load Capacitance Tantalum Capacitors
TA=25°C Cathode Current-mA VKA=Vref
start-up. place GM432 right next load, with load decoupling capacitor directly across must capacitor 10µF.
Stable
VKA= Device does Oscillate 0.01
0.001
GM432
Load Capacitance Tantalum Capacitors
GM432
Stability boundary condition test shows that tantalum capacitors recommended minimize conditions that cause device oscillate.
GM432
IK=10mA TA=25°C
Phase Shift degrees
Small Signal Voltage Gain/Phase Margin
GM432
8.25k
Frequency
100K
Figure Small Signal Voltage Gain/ Phase Margin Frequency
Figure Test Circuit Small Signal Gain Phase
SOT-23 PACKAGE OUTLINE DIMENSIONS
2.90 0.13
0.95 0.038 0.05
Unit:
GM432
0~0.1
Layout
0.031 0.035 0.079
0.05
0.65 0.05 0.05
0.037 0.95
0.037 0.95 Inches
1.10
GM432
SOT-25(SOT-23-5) PACKAGE OUTLINE DIMENSIONS
0.05 0.95 0.038 0.13
Layout
0~0.1
0.028
0.35 0.03
0.15 0.05 0.65 0.05
0.094
0.05
0.037 0.095 0.074 0.037 0.095
Inches
1.10
SOP-8(SO-8) PACKAGE OUTLINE DIMENSIONS
0.008 +0.0018 -0.0005
0.028
+0.022 -0.013 +0.56 -0.33
(0.20
+0.05 -0.01
(0.71
Layout
0.060 1.52
0.236 0.008 (5.99
+0.21 -0.20
0.275 0.155
+0.003 -0.004
GM432
0.154
INDENT
(3.91 0.1)
0.024
0.050 1.270
Inches
0.191
+0.004 -0.002 +0.10 -0.05
(4.85
0.063 0.005 (1.60 0.13)
0.057 (1.45)
Inches
0.0025 0.0015 (0.175 0.075)
0.050 (1.270)
0.016
+0.004 -0.003 +0.10 -0.08
(0.41
GM432
SOT-89 PACKAGE OUTLINE DIMENSIONS
4.50 0.05 1.650 1.400 0.13~4X 0.13~3X
1.50 0.05
Layout
DRAFT~2
Units:
4.20 0.05 0.05
1.00 0.07
3.00 0.025 6°~2X
0.13~2X
0.13~2X 6°~2X
Unit:
TO-92 PACKAGE OUTLINE DIMENSIONS
0.15
1.45
0.46
14.5
1.50
0.46 0.025 1.50
0.38 0.01
0.38 0.015 1.27 1.27
0.15
Unit:
GM432
GM432
ORDERING NUMBER
Gamma Micro. Circuit Type Shipping Ammo Pack Tape Reel Tube
(Tape)
Voltage Tolerance 0.5% 1.0% 2.0%
Package T92: TO-92 ST23: SOT-23 ST25: SOT-25 SO-8
GM432
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