LT1585A

2

MOTOROLA ANALOG IC DEVICE DATA

Rating

Symbol

Pin #

Value

Unit

Maximum Supply Voltage

Vin

3

12

V

Power Dissipation

Case 221A (TO–220) (TJ = +25°C)

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

R

θJA

65

°C/W

Thermal Resistance, Junction–to–Case

R

θJC

5.0

°C/W

Case 936 (D2PAK) (TJ = +25°C)

PD

Internally Limited

W

Thermal Resistance, Junction–to–Ambient

R

θJA

70

°C/W

Thermal Resistance, Junction–to–Case

R

θJC

5.0

°C/W

Storage Temperature Range

Tstg

–65 to 150

°C

Minimum ESD Rating (Human Body Model: C = 100pF, R = 1.5 k

W)

3.0

kV

Lead Temperature (Soldering, 10 sec.)

260

°C

Maximum Junction Temperature

TJ

150

°C

specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics)

Rating

Symbol

Pin #

Value

Unit

Operating Junction Temperature Range

TJ

0 to +125

°C

Supply Voltage

3

7.0

V

Characteristic

Symbol

Pin #

Min

Typ

Max

Unit

Reference Voltage (LT1585A)

Vref

1

V

(Vin–Vout) = 3V, Iout = 10mA, TJ = 25°C

1.238

1.250

1.262

1.5V

≤ (Vin–Vout) ≤ 5.75V, 10mA ≤ Iout ≤ 5A

1.225

1.250

1.275

Output Voltage (LT1585A–1.5)

2

V

Vin = 5V, TJ = 25°C, Iout = 0mA

1.485

1.5

1.515

3V

≤ Vin ≤ 7V, 0mA ≤ Iout ≤ 5A

1.470

1.5

1.530

Line Regulation [Notes 1, 2]

Regline

2

%

LT1585A: 2.75V

≤ Vin ≤ 7V, Iout = 10mA

–

0.005

0.2

LT1585A–1.5: 3V

≤ Vin ≤ 7V, Iout = 0mA

–

0.005

0.2

Load Regulation [Notes 1, 2]

Regload

2

%

LT1585A: (Vin–Vout) = 3V, TJ = 25°C, 10mA ≤ Iout ≤ 5A

–

0.05

0.3

LT1585A–1.5: Vin = 5V, TJ = 25°C, 0mA ≤ Iout ≤ 5A

–

0.05

0.3

LT1585A: (Vin–Vout) = 3V, 10mA ≤ Iout ≤ 5A

–

0.05

0.5

LT1585A–1.5: Vin = 5V, 0mA ≤ Iout ≤ 5A

–

0.05

0.5

Dropout Voltage

Vin–Vout

V

LT1585A:

DVREF = 1%, IOUT = 3A

–

1.150

1.300

LT1585A–1.5:

DVOUT = 1%, IOUT = 3A

–

1.150

1.300

LT1585A:

DVREF = 1%, IOUT = 5A

–

1.200

1.400

LT1585A–1.5:

DVOUT = 1%, IOUT = 5A

–

1.200

1.400

Current Limit [Note 3]

ILimit

2

A

(Vin–Vout) = 5.5V

5.0

6.0

–

Adjust Pin Current (LT1585A)

IAdj

1

–

55

120

µA

Adjust Pin Current Change (LT1585A) [Note 3]

1

µA

1.5V

≤ (Vin–Vout) ≤ 5.75V, 10mA ≤ Iout ≤ 5A

–

0.2

5.0

Minimum Load Current (LT1585A) 1.5V

≤ (Vin–Vout) ≤ 5.75V

ILoad min

2

–

2.0

10

mA

Quiescent Current (LT1585A–1.5) Vin = 5V

1

–

7.0

13

mA

Ripple Rejection

RR

2

dB

LT1585A: f = 120Hz, Cout = 25µF Tant., (Vin–Vout) = 3V, Iout = 5A

60

72

–

LT1585A–1.5: f = 120Hz, Cout = 25µF Tant., Vin = 4.5V, Iout = 5A

60

72

–

Thermal Regulation TJ = 25°C, 30ms Pulse

T

°Reg

–

0.004

–

%/W

Temperature Stability

T

°Stab

–

0.5

–

%

Long Term Stability TJ = 125°C, 1000 Hrs

–

0.03

1.0

%

RMS Output Noise (% of Vout) TJ = 25°C, 10Hz ≤ f ≤ 10kHz

–

0.003

–

%

NOTES 1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant

junction temperature by low duty cycle pulse testing.

2. Line and load regulations are guaranteed up to the maximum power dissipation 28.8W for the LT1585A in T–package. Power dissipation is

determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/output voltage range.

3. The LT1585A has constant current limit with changes in input–to–output voltage.