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Part: KA78RM33
Category:
Power Management
-> Regulators
-> Linear Regulators
-> LDO (Low Drop Out)
Description: 0.5A Fixed 3.3V Low Dropout Voltage Regulator (LDO)
Company: Fairchild Semiconductor
Datasheet: Download KA78RM33 datasheet File size : 429 kB
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www.fairchildsemi.com
KA78RM33
Features
· · · ·
Low Dropout Voltage Regulator
Description
The KA78RM33 is a low-dropout voltage regulator suitable for various electronic equipment. It provide constant voltage power source with surface mount type package (D-PAK). dropout voltage of KA78RM33 is below 0.6V in full rated current(0.5A). This regulator has various function such as over current protection, thermal shut down and SOA (Safe operating Area) protection.
D-PAK
0.5A / 3.3V Output low dropout voltage regulator Low dropout voltage (Max. 0.6V) Over current protection, Thermal shutdown SOA protection, Shortcircuit protection
1
TO-220
1
1. Vin 2. GND 3. Vout
Internal Block Digram
Vin 1 Q1 3 Vout
Current Generator
Thermal Shutdown Protection
SOA Protection
Short Circuit Protection
Bandgap Reference
Error Amp.
Output Drive
R1
R2
GND
2 3
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation
KA78RM33
Absolute Maximum Ratings
Parameter Input Voltage Output Current Thermal Resistance Junction-Air Power Dissipation Junction Temperature Operating Temperature Symbol
Vin
Value 20 0.5 110 Interally limited 150 -25~ + 125
Un it V °C/W - °C °C
Remark No Heatsink -
IO R J A
Pd
Tj TOPR
Electrical Characteristics
(Vin = 5V, IO= 0.25A, Ta = 25°C , unless otherwise specified)
Parameter Output Voltage Load Regulation Line Regulation Ripple Rejection Ratio Dropout Voltage Quiescent Current Peak Current Output Noise Voltage Temperature Coefficient of Output Voltage
Symbol VOut RlOad Rline RR Vdrop q IPK Vn VOUT/T
Conditions IO =10mA 5mA < IO < 0.5A 4.3V Min. 3.22 55 0.5 -
Typ. 3.3 2 2 5 1 50 - 0 .2
M ax. 3.38 20 20 0 .6 10 -
Unit V mV mV dB V mA A uVrms m V /° C
2
KA78RM33
Mechanical Dimensions
Package Dimensions in millimeters
TO-220
9.90 ±0.20 1.30 ±0.10 2.80 ±0.10 (8.70) ø3.60 ±0.10 (1.70) 4.50 ±0.20
1.30 0.05
+0.10
9.20 ±0.20
(1.46)
13.08 ±0.20
(1.00)
(3.00)
15.90 ±0.20
1.27 ±0.10
1.52 ±0.10
0.80 ±0.10 2.54TYP [2.54 ±0.20] 2.54TYP [2.54 ±0.20]
10.08 ±0.30
18.95MAX.
(3.70)
(45° )
0.50 0.05
+0.10
2.40 ±0.20
10.00 ±0.20
3
Others parts begin by ka
KA-1 KA-2 KA-3 KA-4 KA-5 KA-6 KA-7
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