Overview

Part: LM340, LM340A, LM7805, LM7812, LM7815

Type: Fixed Voltage Regulators

Key Specs:

Output Current: up to 1.5 A
Output Voltage Options: Fixed 5-V, 12-V, and 15-V
Output Voltage Tolerances: ±2% at T_J = 25°C (LM340A)
Line Regulation: 0.01% / V at 1-A Load (LM340A)
Load Regulation: 0.3% / A (LM340A)

Features:

Internal Thermal Overload, Short-Circuit and SOA Protection
Available in Space-Saving SOT-223 Package
Output Capacitance Not Required for Stability
Monolithic 3-terminal positive voltage regulators
Employ internal current-shutdown safe-area thermal and compensation
Essentially indestructible (with adequate heat sinking)
Can be used with external components to obtain adjustable output voltages and currents
Easy to use and minimize external components
Input bypassing needed only if regulator is far from filter capacitor

Applications:

Industrial Power Supplies
SMPS Post Regulation
HVAC Systems
AC Inventors
Test and Measurement Equipment

Features

Output Current up to 1.5 A
Available in Fixed 5-V, 12-V, and 15-V Options
Output Voltage Tolerances of ±2% at T_J = 25°C (LM340A)
Line Regulation of 0.01% / V of at 1-A Load (LM340A)
Load Regulation of 0.3% / A (LM340A)
Internal Thermal Overload, Short-Circuit and SOA Protection
Available in Space-Saving SOT-223 Package
Output Capacitance Not Required for Stability

Applications

Industrial Power Supplies
SMPS Post Regulation
HVAC Systems
AC Inventors
Test and Measurement Equipment
Brushed and Brushless DC Motor Drivers
Solar Energy String Invertors

Available Packages

Pin Configuration

LM7805 and LM7812 KTT Package 3-Pin DDPAK/TO-263 Top View

LM7805, LM7812, and LM7815 NDE Package 3-Pin TO-220 Top View

LM340K-5.0 NDS Package 2-Pin TO-3 Top View

Pin Functions

| | PIN | |-------------|-----|-----|--------------------|--|--|--| | NAME
NO. | | I/O | DESCRIPTION | | INPUT | 1 | I | Input voltage pin | | GND | 2 | I/O | Ground pin | | OUTPUT
3 | | O | Output voltage pin |

Electrical Characteristics

IOUT = 1 A, 0°C ≤ T^J ≤ 125°C (LM340A) unless otherwise specified(1)

	PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
		TJ = 25°C		4.9	5	5.1	V
VO	Output voltage	PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A		4.8		5.2
		7.5 V ≤ VIN ≤ 20 V					V
		7.5 V ≤ VIN ≤ 20	TJ = 25°C		3	10	mV
		V	Over temperature, IO = 500 mA			10	mV
ΔVO	Line regulation	8 V ≤ VIN ≤ 12 V	TJ = 25°C			4	mV
			Over temperature			12	mV
			5 mA ≤ IO ≤ 1.5 A		10	25	mV
ΔVO	Load regulation	TJ = 25°C	250 mA ≤ IO ≤ 750 mA			15	mV
		Over temperature, 5 mA ≤ IO ≤ 1 A				25	mV
		TJ = 25°C				6	mA
IQ	Quiescent current	Over temperature				6.5	mA
		TJ = 25°C, IO = 1 A				0.8
		7.5 V ≤ VIN ≤ 20 V					mA
ΔIQ	Quiescent current change	Over temperature, 5 mA ≤ IO ≤ 1 A				0.5	mA
		Over temperature, IO = 500 mA				0.8
		8 V ≤ VIN ≤ 25 V					mA
VN	Output noise voltage	TA = 25°C, 10 Hz ≤ f ≤ 100 kHz			40		μV
		f = 120 Hz	TJ = 25°C, , IO = 1 A	68	80		dB
	Ripple rejection	8 V ≤ VIN ≤ 18 V	Over temperature, IO = 500 mA	68			dB
	Dropout voltage	TJ = 25°C, IO = 1 A			2		V
	Output resistance	f = 1 kHz			8		mΩ
RO	Short-circuit current	TJ = 25°C			2.1		A
	Peak output current	TJ = 25°C			2.4		A
	Average TC of VO	Min, TJ = 0°C, IO = 5 mA			−0.6		mV/°C
VIN	Input voltage required to maintain line regulation	TJ = 25°C		7.5			V

⁽¹⁾ All characteristics are measured with a 0.22-μF capacitor from input to ground and a 0.1-μF capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (t^w ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account separately.

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)(2)

| | | MIN | MAX | UNIT | |---------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----|-----|------|--| | DC input voltage | power dissipation ⁽³⁾ In junction temperature Inperature (soldering, 10 sec.) TO-3 package (NDS) Lead temperature 1,6 mm (1/16 in) from case for 10 sec. | | | V | | Internal power dissipation (3) | rnal power dissipation (3) kimum junction temperature d temperature (soldering, 10 sec.) TO-3 package (NDS) Lead temperature 1,6 mm (1/16 in) from case for 10 | | Maximum junction temperature | · · · · | | Land to an automa (acidaria a 10 aca) | TO-3 package (NDS) | | 300 | °C | | Lead temperature (soldering, 10 sec.) | Lead temperature 1,6 mm (1/16 in) from case for 10 s | | 230 | °C | | Storage temperature | | -65 | 150 | °C |

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

		MIN	MAX	UNIT
Temperature (T _A )	LM340A, LM340	0	125	°C

6.4 Thermal Information

| | | LM340, LM7805 Family | |------------------------|----------------------------------------------|-----------------------|------------------|---------------|--------|------|--| | | THERMAL METRIC ⁽¹⁾ | KTT
(DDPAK/TO-263) | DCY
(SOT-223) | NDS
(TO-3) | UNIT | | | | 3 PINS | 3 PINS | 4 PINS | 2 PINS | | $R_{\theta JA}$ | Junction-to-ambient thermal resistance | 23.9 | 44.8 | 62.1 | 39 | °C/W | | $R_{\theta JC(top)}$ | Junction-to-case (top) thermal resistance | 16.7 | 45.6 | 44 | 2 | °C/W | | $R_{\theta JB}$ | Junction-to-board thermal resistance | 5.3 | 24.4 | 10.7 | _ | °C/W | | ΨЈT | Junction-to-top characterization parameter | 3.2 | 11.2 | 2.7 | _ | °C/W | | ΨЈB | Junction-to-board characterization parameter | 5.3 | 23.4 | 10.6 | _ | °C/W | | R _θ JC(bot) | Junction-to-case (bottom) thermal resistance | 1.7 | 1.5 | _ | _ | °C/W |

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Thermal Information

| | | LM340, LM7805 Family | |------------------------|----------------------------------------------|-----------------------|------------------|---------------|--------|------|--| | | THERMAL METRIC ⁽¹⁾ | KTT
(DDPAK/TO-263) | DCY
(SOT-223) | NDS
(TO-3) | UNIT | | | | 3 PINS | 3 PINS | 4 PINS | 2 PINS | | $R_{\theta JA}$ | Junction-to-ambient thermal resistance | 23.9 | 44.8 | 62.1 | 39 | °C/W | | $R_{\theta JC(top)}$ | Junction-to-case (top) thermal resistance | 16.7 | 45.6 | 44 | 2 | °C/W | | $R_{\theta JB}$ | Junction-to-board thermal resistance | 5.3 | 24.4 | 10.7 | _ | °C/W | | ΨЈT | Junction-to-top characterization parameter | 3.2 | 11.2 | 2.7 | _ | °C/W | | ΨЈB | Junction-to-board characterization parameter | 5.3 | 23.4 | 10.6 | _ | °C/W | | R _θ JC(bot) | Junction-to-case (bottom) thermal resistance | 1.7 | 1.5 | _ | _ | °C/W |