LM2585 datasheet(5/32 Pages) TI

5 / 32 page

LM2585

www.ti.com

SNVS120F – APRIL 2000 – REVISED APRIL 2013

Electrical Characteristics (All Versions)

Symbol

Parameters

Conditions

Typical

Min

Max

Units

COMMON DEVICE PARAMETERS for all versions (1)

Input Supply Current

(Switch Off)(2)

15.5/16.5

ISWITCH = 1.8A

100/115

VUV

Input Supply

RLOAD = 100Ω

3.30

3.05

3.75

Undervoltage Lockout

Oscillator Frequency

Measured at Switch Pin

RLOAD = 100Ω

100

85/75

115/125

kHz

VCOMP = 1.0V

fSC

Short-Circuit

Measured at Switch Pin

Frequency

RLOAD = 100Ω

kHz

VFEEDBACK = 1.15V

VEAO

Error Amplifier

Upper Limit(3)

2.8

2.6/2.4

Output Swing

Lower Limit(2)

0.25

0.40/0.55

IEAO

Error Amp

See (4)

165

110/70

260/320

μA

Output Current

(Source or Sink)

ISS

Soft Start Current

VFEEDBACK = 0.92V

11.0

8.0/7.0

17.0/19.0

μA

VCOMP = 1.0V

Maximum Duty

RLOAD = 100Ω

(3)

93/90

Cycle

Switch Leakage

Switch Off

300/600

μA

Current

VSWITCH = 60V

VSUS

Switch Sustaining

dV/dT = 1.5V/ns

Voltage

VSAT

Switch Saturation

ISWITCH = 3.0A

0.45

0.65/0.9

Voltage

ICL

NPN Switch

4.0

3.0

7.0

Current Limit

θJA

Thermal Resistance

TO-220 Package, Junction to

Ambient(5)

θJA

TO-220 Package, Junction to

Ambient(6)

θJC

TO-220 Package, Junction to

Case

θJA

DDPAK/TO-263 Package,

°C/W

Junction to Ambient(7)

θJA

DDPAK/TO-263 Package,

Junction to Ambient(8)

(1)

All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using

standard Statistical Quality Control (SQC) methods.

(2)

To measure this parameter, the feedback voltage is set to a high value, depending on the output version of the device, to force the error

amplifier output low. Adj: VFB = 1.41V; 3.3V: VFB = 3.80V; 5.0V: VFB = 5.75V; 12V: VFB = 13.80V.

(3)

To measure this parameter, the feedback voltage is set to a low value, depending on the output version of the device, to force the error

amplifier output high. Adj: VFB = 1.05V; 3.3V: VFB = 2.81V; 5.0V: VFB = 4.25V; 12V: VFB = 10.20V.

(4)

To measure the worst-case error amplifier output current, the LM2585 is tested with the feedback voltage set to its low value (specified

in Tablenote 3) and at its high value (specified in Tablenote 2).

(5)

Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads in a

socket, or on a PC board with minimum copper area.

(6)

Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads

soldered to a PC board containing approximately 4 square inches of (1oz.) copper area surrounding the leads.

(7)

Junction to ambient thermal resistance for the 5 lead TO-263 mounted horizontally against a PC board area of 0.136 square inches (the

same size as the DDPAK/TO-263 package) of 1 oz. (0.0014 in. thick) copper.

(8)

Junction to ambient thermal resistance for the 5 lead TO-263 mounted horizontally against a PC board area of 0.4896 square inches

(3.6 times the area of the DDPAK/TO-263 package) of 1 oz. (0.0014 in. thick) copper.

Submit Documentation Feedback

Product Folder Links: LM2585

LM2585 Datasheet(PDF) 5 Page - Texas Instruments

LM2585 Datasheet(HTML) 5 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Datasheet Download

Link URL