AMS2596

3A 30V Step-Down Converter

3/4/2010

www.advanced-monolithic.com

Phone (925) 443-0722

3

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Absolute Maximum Ratings

(1)

FB feedback pin……………………...........……-0.3V to +30V

EN Enable Voltage…………………….…....….-0.3V to +20V

Storage Temperature Range…………...…...-65⁰C to 150⁰C

Lead Temperature (Soldering 60se………….….…… 215⁰C

Junction Temperature………...……………….….…… 150⁰C

ESD Suceptability…………………………………………..2kV

Recommended Operating Conditions

(2)

Input Voltage……………………………………..………..4.5V to 28 V

Tj Operating Temperature…… ……………….…….-25⁰C to 125⁰C

Thermal Information

TO263-5

TO-252

TO-220

Electrical Characteristics

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

4.5

12

20

V

Feedback Voltage

4.5V ≤ VIN ≤ 30V,

0.2A ≤ ILoad ≤ 3A

1.193

1.180

1.230

1.267

1.280

V

Efficiency

η

85

%

Oscillator Frequency

127

150

173

kHz

Saturation Voltage

1.16

1.4/1.5

V

Maximum Duty Cycle

Note 6

95

99

%

Minimum Duty Cycle

Note 7

0

%

Current Limit

3.6 / 3.4

4.5

6.9 / 7.5

A

Shutdown Supply Current

90

nA

Output Leakage Current

Output = 0V (Note 8)

Output = -1V

2

50

30

μA

Quiescent Current

(Note 6)

5

10

mA

Standby Quiescent Current

ON/OFF pin = 5V (OFF)

80

200

250

μA

Enable Logic Input

Threshold Voltage

Low (Regulator ON)

High (Regulator OFF)

1.3

0.6

2.0

V

V

V

Enable Input Current

5

0.02

5

0.02

15

5

µA

µA

Over-temperature

Sh td

125

°C

Notes:

1.

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical

Characteristics.

2.

3.

Typical numbers are at 25ºC and represent the most likely norm.

4.

All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%

production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are

used to calculate Average Outgoing Quality Level (AOQL).

5.

Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

6.

Feedback pin removed from output and connected to 12V for Fixed and Adjustable version, to force the output transistor switch OFF.

7.

With output transistor switch turned off.

8.

Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with the leads soldered to a printed circuit

board with (1 oz.) and a heat sink approximately 1 in

9.

Junction to ambient thermal resistance with the TO-263 package tab soldered to a double side printed circuit board with 2.5 in

10.

Junction to ambient thermal resistance with the TO-252 package tab soldered to a single sided printed circuit board with 2.5 in

11.

Junction to ambient thermal resistance with the SO-8 EDP package soldered to a double sided printed circuit board 5 via under the package paddle

crossing to the other side of PCB on 2.5 in