TX5321
High Temperature, 3-­‐Terminal, Negative Linear Regulator featuring Low Dropout and Short Circuit Protection FEATURES • Operating Temperature Range: -­‐55 °C to + 200 °C • Output Current : 250Ma • Fixed Output Voltages -­‐3.3, -­‐5.0, -­‐10, -­‐12, or -­‐15 • Low Dropout Voltage : < 1 Volt • Short Circuit Protected • Input Voltage up to 32Vdc • TO-­‐254 Hermetic Metal Package • Well behaved turn-­‐on characteristics APPLICATIONS • Downhole Logging • Avionics / Space Systems • Earth Sciences • Measurement While Drilling • Turbine Engine control OUTPUT vs DASH # • TX5321-­‐3.3 -­‐3.3 Volts • TX5321-­‐5.0 -­‐5.0 Volts • TX5321-­‐10 -­‐10 Volts • TX5321-­‐12 -­‐12 Volts • TX5321-­‐15 -­‐15 Volts DESCRIPTION The TX5321 is a family of hybrid linear regulators specifically designed for sustained high temperature applications. All parts are 100% screened and tested to eliminate infant mortality. All devices receive an active burn-­‐in at 150°C for 80 hours. The TX5321 is a precision regulator with voltage output settings trimmed to specific voltages within ± 0.5%. Users may select from 5 fixed output voltages of -­‐3.3, -­‐5.0, -­‐10, -­‐12, -­‐15 volts or custom output voltages upon request. The TX5321 is self-­‐protected against prolonged short circuits at any temperature within its operating range. Only two 10uF external capacitors are necessary to insure unit stability and to improve high frequency load regulation The low voltage dropout feature enhances functionality by maintaining the output voltage with input voltages only 0.8 volts greater than the output. The TX5321 is also designed to shut-­‐down to a minimum current level (< 4 mA ) in the presence of an output short circuit and recover when the short is removed. This is designed to protect both the regulator and system components. 0.250
0.540
.045
VOUT
VIN
0.795
0.675
0.540
GND
0.144 Dia
0.540
.150
TO-254 ( Top View )
Copyright 2012 Texas Microelectronics Corporation
www.texasmicroelectronics.com
TX5321 Specifications ABSOLUTE MAXIMUM RATINGS Power Dissipation ………………………………….
6 Watts
Input Voltage ………………………………………
+ 32Vdc
Operating Case Temperature Range ……. –55°C to + 200°C
Storage Temperature Range ……………. –65°C to + 240°C
+300°C
Lead Soldering Temperature ………………………
ELECTRICAL CHARACTERISTICS (unless otherwise indicated: Tcase = 25°C) PARAMETER CONDITIONS TYP Line Regulation Iout = 250mA 0.1 % Load Regulation Ein = Eout + 2 Vdc 50mA ≤ Iout ≤ 250mA 0.5 % Dropout voltage Iout = 50mA, Tcase = 25°C .1 Vdc Iout = 250mA, Tcase = 25°C .8 Vdc Iout = 50mA, Tcase = 200°C .2 Vdc Iout = 250mA, Tcase = 200°C .9 Vdc Quiescent Current Ein = Eout +2 Vdc Tcase= 25°C 4.5 mA Tcase= 200°C 4.2 mA Current Limit Ein = Eout + 2 Vdc 480 ( Nom ) mA Turn on Time / Overshoot < 2 ms Temperature Stability Ein = Eout + 2 Vdc @ 180°C -­‐1.4% max See Figure 1 Ripple Rejection See Figure 2 Thermal Resistance Junction to Case 8.7 °C/W Copyright 2012 Texas Microelectronics Corporation
www.texasmicroelectronics.com
Performance Graphs VOut - Normalized
Voltage vs Temperature
1.10
1.05
1.00
0.95
0.90
0
20
40
60
80
100
120
Degrees C
140
160
180
200
220
dB
Figure 1 Ripple Rejection vs Frequency
-140
-120
-100
-80
-60
-40
1e+2
1e+3
Current Limit vs Temperature
IOut - Normalized
1.05
1.00
0.95
0.90
0.85
0.80
0
1e+4
1e+5
Figure 2 IOut - Normalized
Frequency - Hz
40
80 120 160 200
Degrees C
1.05
1.00
0.95
0.90
0.85
0.80
Current Limit vs Input Voltage
6 8 10 12 14 16 18 20 22 24 26 28
Volts
Current Limit change with Temperature and Input Voltage Copyright 2012 Texas Microelectronics Corporation
www.texasmicroelectronics.com