SNVS771 Data sheet

6.1 Absolute Maximum Ratings

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

		MIN	MAX	UNIT
Input and output voltage differential		–0.3	40	V
Power dissipation		Internally limited
Lead temperature	TO-3 package (soldering, 10 s)		300	°C
Lead temperature	TO-220 package (soldering, 4 s)		260	°C
Operating temperature, T_J	LM138	–55	150	°C
Operating temperature, T_J	LM338	0	125	°C
Storage temperature, T_stg		–65	150	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 Recommended Operating Conditions

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

	MIN	MAX	UNIT
Input-to-output voltage differential	3	40	V
Output current		5	A

6.3 Thermal Information

THERMAL METRIC⁽¹⁾		LM338	LM338		UNIT
		NDS (TO-CAN)	NDE (TO-220)	NDS (TO-CAN)
		2 PINS	3 PINS	2 PINS
R_θJA	Junction-to-ambient thermal resistance	35	22.9	35	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	1	15.7	1	°C/W
R_θJB	Junction-to-board thermal resistance	—	4.1	—	°C/W
ψ_JT	Junction-to-top characterization parameter	—	2.1	—	°C/W
ψ_JB	Junction-to-board characterization parameter	—	4.1	—	°C/W
R_θJC(bot)	Junction-to-case (bottom) thermal resistance	—	0.7	—	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.4 Electrical Characteristics: LM138

Values apply for T_J = 25°C; V_IN – V_OUT = 5 V; and I_OUT = 10 mA (unless otherwise noted).⁽¹⁾

PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
V_REF	Reference voltage	3 V ≤ (V_IN – V_OUT) ≤ 35 V, 10 mA ≤ I_OUT ≤ 5 A, P ≤ 50 W, T_J = –55°C to 150°C		1.19	1.24	1.29	V
V_RLINE	Line regulation	3 V ≤ (V_IN – V_OUT) ≤ 35 V⁽²⁾	T_J = 25°C		0.005%	0.01%	V
V_RLINE	Line regulation	3 V ≤ (V_IN – V_OUT) ≤ 35 V⁽²⁾	T_J = –55°C to 150°C		0.02%	0.04%	V
V_RLOAD	Load regulation	10 mA ≤ I_OUT ≤ 5 A⁽²⁾	T_J = 25°C		0.1%	0.3%
V_RLOAD	Load regulation	10 mA ≤ I_OUT ≤ 5 A⁽²⁾	T_J = –55°C to 150°C		0.3%	0.6%
	Thermal regulation	20 ms pulse			0.002%	0.01%	W
I_ADJ	Adjustment pin current	T_J = –55°C to 150°C			45	100	µA
ΔI_ADJ	Adjustment pin current change	10 mA ≤ I_OUT ≤ 5 A, 3 V ≤ (V_IN – V_OUT) ≤ 35 V, T_J = –55°C to 150°C			0.2	5	µA
ΔV_R/T	Temperature stability	T_J = –55°C to 150°C			1%
I_LOAD(MIN)	Minimum load current	V_IN – V_OUT = 35 V, T_J = –55°C to 150°C			3.5	5	mA
I_CL	Current limit	V_IN – V_OUT ≤ 10 V
		DC, T_J = –55°C to 150°C		5	8		A
		0.5-ms peak, T_J = –55°C to 150°C		7	12		A
		V_IN – V_OUT = 30 V			1	1	A
V_N	RMS output noise (percent of V_OUT)	10 Hz ≤ f ≤ 10 kHz			0.003%
ΔV_R/ΔV_IN	Ripple rejection ratio	V_OUT = 10 V, f = 120 Hz, C_ADJ = 0 µF, T_J = –55°C to 150°C			60		dB
ΔV_R/ΔV_IN	Ripple rejection ratio	V_OUT = 10 V, f = 120 Hz, C_ADJ = 10 µF, T_J = –55°C to 150°C		60	75		dB
	Long-term stability	T_J = 125°C, 1000 Hrs			0.3%	1%

(1) These specifications are applicable for power dissipations up to 50 W for the TO-3 (NDS) package and 25 W for the TO-220 (NDE) package. Power dissipation is specified at these values up to 15-V input-output differential. Above 15-V differential, power dissipation is limited by internal protection circuitry. All limits (that is, the numbers in the minimum and maximum columns) are specified to TI's AOQL (Average Outgoing Quality Level).

(2) Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specifications for thermal regulation.

6.5 Electrical Characteristics: LM338

Values apply for T_J = 25°C; V_IN – V_OUT = 5 V; and I_OUT = 10 mA (unless otherwise noted).⁽¹⁾

PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
V_REF	Reference voltage	3 V ≤ (V_IN – V_OUT) ≤ 35 V, 10 mA ≤ I_OUT ≤ 5 A, P ≤ 50 W, T_J = 0°C to 125°C		1.19	1.24	1.29	V
V_RLINE	Line regulation	3 V ≤ (V_IN – V_OUT) ≤ 35 V⁽²⁾	T_J = 25°C		0.005%	0.03%	V
V_RLINE	Line regulation	3 V ≤ (V_IN – V_OUT) ≤ 35 V⁽²⁾	T_J = 0°C to 125°C		0.02%	0.06%	V
V_RLOAD	Load regulation	10 mA ≤ I_OUT ≤ 5 A⁽²⁾	T_J = 25°C		0.1	0.5
V_RLOAD	Load regulation	10 mA ≤ I_OUT ≤ 5 A⁽²⁾	T_J = 0°C to 125°C		0.3	1
	Thermal regulation	20-ms pulse			0.002%	0.02%	W
I_ADJ	Adjustment pin current	T_J = 0°C to 125°C			45	100	µA
ΔI_ADJ	Adjustment pin current change	10 mA ≤ I_OUT ≤ 5 A, 3 V ≤ (V_IN – V_OUT) ≤ 35 V, T_J = 0°C to 125°C			0.2	5	µA
ΔV_R/T	Temperature stability	T_J = 0°C to 125°C			1
I_LOAD(MIN)	Minimum load current	V_IN – V_OUT = 35 V, T_J = 0°C to 125°C			3.5	10	mA
I_CL	Current limit	V_IN – V_OUT ≤ 10 V
		DC, T_J = 0°C to 125°C		5	8		A
		0.5-ms peak, T_J = 0°C to 125°C		7	12		A
		V_IN – V_OUT = 30 V				1	A
V_N	RMS output noise (percent of V_OUT)	10 Hz ≤ f ≤ 10 kHz			0.003%
ΔV_R/ΔV_IN	Ripple rejection ratio	V_OUT = 10 V, f = 120 Hz, C_ADJ = 0 µF, T_J = 0°C to 125°C			60		dB
ΔV_R/ΔV_IN	Ripple rejection ratio	V_OUT = 10 V, f = 120 Hz, C_ADJ = 10 µF, T_J = 0°C to 125°C		60	75		dB
	Long-term stability	T_J = 125°C, 1000 Hrs			0.3%	1%

(1) These specifications are applicable for power dissipations up to 50 W for the TO-3 (NDS) package and 25 W for the TO-220 (NDE) package. Power dissipation is specified at these values up to 15-V input-output differential. Above 15-V differential, power dissipation is limited by internal protection circuitry. All limits (that is, the numbers in the minimum and maximum columns) are specified to TI's AOQL (Average Outgoing Quality Level).

(2) Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specifications for thermal regulation.