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LM79L05AC is OBSOLETE
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LM79L05, LM79L12, LM79L12AC LM79L15, LM79L15AC
SNOSBR8K – JULY 1999 – REVISED APRIL 2013
LM79LXXAC Series 3-Terminal Negative Regulators
Check for Samples: LM79L05, LM79L12, LM79L12AC, LM79L15, LM79L15AC
FEATURES
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•2 Preset Output Voltage Error is Less than ±5% Over Load, Line and Temperature
• Specified at an Output Current of 100mA
• Easily Compensated with a Small 0.1μF Output Capacitor
• Internal Short-Circuit, Thermal and Safe Operating Area Protection
• Easily Adjustable to Higher Output Voltages
• Maximum Line Regulation Less than 0.07% VOUT/V
• Maximum Load Regulation Less than 0.01% VOUT/mA
• See AN-1112 (SNVA009) for DSBGA Considerations
DESCRIPTION
The LM79LXXAC series of 3-terminal negative voltage regulators features fixed output voltages of −5V, −12V, and −15V with output current capabilities in excess of 100mA. These devices were designed using the latest computer techniques for optimizing the packaged IC thermal/electrical performance. The LM79LXXAC series, when combined with a minimum output capacitor of 0.1μF, exhibits an excellent transient response, a maximum line regulation of 0.07% VO/V, and a maximum load regulation of 0.01% VO/mA.
The LM79LXXAC series also includes, as selfprotection circuitry: safe operating area circuitry for output transistor power dissipation limiting, a temperature independent short circuit current limit for peak output current limiting, and a thermal shutdown circuit to prevent excessive junction temperature. Although designed primarily as fixed voltage regulators, these devices may be combined with simple external circuitry for boosted and/or adjustable voltages and currents. The LM79LXXAC series is available in the 3-lead TO package, the 8-lead SOIC package, and the 6-Bump DSBGA package.
For output voltages other than the pre-set -5V, -12V and -15V, the LM137L series provides an adjustable output voltage range from -1.2V to -47V.
Typical Applications
*Required if the regulator is located far from the power supply filter. A 1μF aluminum electrolytic may be substituted. **Required for stability. A 1μF aluminum electrolytic may be substituted.
Figure 1. Fixed Output Regulator
−V0 = −5V − (5V/R1 + IQ) • R2, 5V/R1 > 3 IQ
Figure 2. Adjustable Output Regulator
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated
LM79L05, LM79L12, LM79L12AC LM79L15, LM79L15AC
SNOSBR8K – JULY 1999 – REVISED APRIL 2013
LM79L05AC is OBSOLETE
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
Connection Diagram
-VOUT 1 -VIN 2 -VIN 3 NC 4
LM79LXXACM
8 NC 7 -VIN 6 -VIN 5 GND
Pins labeled 'NC' on LM79LXXACM 8-Lead SOIC (pin 4 and pin 8) are Open, no internal connection.
Figure 3. 8-Lead SOIC Narrow (D) Top View
Figure 4. 3–Lead TO-226 (LP) Bottom View
GND A2
-VOUT B2
-VIN C2
A1 B1 C1
GND
-VOUT
-VIN
Figure 5. 6-Bump DSBGA Top View (Bump Side Down)
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Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM79L05 LM79L12 LM79L12AC LM79L15 LM79L15AC
www.ti.com
LM79L05AC is OBSOLETE
LM79L05, LM79L12, LM79L12AC LM79L15, LM79L15AC
SNOSBR8K – JULY 1999 – REVISED APRIL 2013
Absolute Maximum Ratings(1)(2)
Input Voltage VO = −5V, −12V, −15V
Internal Power Dissipation (3) Operating Temperature Range Maximum Junction Temperature Storage Temperature Range Lead Temperature
(Soldering, 10 sec.)
−35V Internally Limited
0°C to +70°C +125°C
−55°C to +150°C
260°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) Thermal resistance of TO-226 (LP) package is 60°C/W θJC, 232°C/W θJA at still air, and 88°C/W at 400 ft/min of air. The θJA of the LM78LXX in the 6-Bump DSBGA package is 114°C/W when mounted on a 4-Layer JEDEC test board (JESD 51-7). The θJA of the LM78LXX in the SOIC-8 (D) package is 180°C/W in still air. The maximum junction temperature shall not exceed 125°C on electrical
parameters.
Electrical Characteristics (1)
TA = 0°C to +70°C unless otherwise.