LM2588SX-5.0 datasheet(7/38 Pages) TI1

Part #	LM2588SX-5.0

Description	LM2588 SIMPLE SWITCHER 5A Flyback Regulator with Shutdown

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Manufacturer	TI1 [Texas Instruments]

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LM2588

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SNVS117D – APRIL 1998 – REVISED APRIL 2013

LM2588-ADJ Electrical Characteristics

Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature

Range. Unless otherwise specified, VIN = 5V.

Symbol

Parameters

Conditions

Typical

Min

Max

Units

SYSTEM PARAMETERS Test Circuit of Figure 19(1)

VOUT

Output Voltage

VIN = 4V to 10V

12.0

11.52/11.40

12.48/12.60

V

ILOAD = 300 mA to 1.2A

ΔVOUT/

Line Regulation

VIN = 4V to 10V

20

100/200

mV

ΔVIN

ILOAD = 300 mA

ΔVOUT/

Load Regulation

VIN = 10V

20

100/200

mV

ΔILOAD

ILOAD = 300 mA to 1.2A

η

Efficiency

VIN = 10V, ILOAD = 1A

90

%

UNIQUE DEVICE PARAMETERS(2)

VREF

Output Reference

Measured at Feedback Pin

1.230

1.208/1.205

1.252/1.255

V

Voltage

VCOMP = 1.0V

ΔVREF

Reference Voltage Line VIN = 4V to 40V

1.5

mV

Regulation

GM

Error Amp

ICOMP = −30 μA to +30 μA

3.200

1.800

6.000

mmho

Transconductance

VCOMP = 1.0V

AVOL

Error Amp Voltage

VCOMP = 0.5V to 1.6V

670

400/200

V/V

Gain

RCOMP = 1.0 MΩ

(3)

IB

Error Amp Input Bias

VCOMP = 1.0V

125

425/600

nA

Current

(1)

External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the

LM2588 is used as shown in Figure 18 and Figure 19, system performance will be as specified by the system parameters.

(2)

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.

(3)

A 1.0 M

Ω resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring AVOL.

All Output Voltage Versions Electrical Characteristics

(1)

Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature

Range. Unless otherwise specified, VIN = 5V.

Symbol

Parameters

Conditions

Typical

Min

Max

Units

IS

Input Supply Current

Switch Off(2)

11

15.5/16.5

mA

ISWITCH = 3.0A

85

140/165

mA

IS/D

Shutdown Input

VSH = 3V

16

100/300

μA

Supply Current

VUV

Input Supply

RLOAD = 100Ω

3.30

3.05

3.75

V

Undervoltage Lockout

fO

Oscillator Frequency

Measured at Switch Pin

RLOAD = 100Ω, VCOMP = 1.0V

100

85/75

115/125

kHz

Freq. Adj. Pin Open (Pin 1)

RSET = 22 kΩ

200

kHz

fSC

Short-Circuit Frequency Measured at Switch Pin

25

kHz

RLOAD = 100Ω

VFEEDBACK = 1.15V

VEAO

Error Amplifier Output

Upper Limit(3)

2.8

2.6/2.4

V

Swing

Lower Limit(2)

0.25

0.40/0.55

V

(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 and the switch off.

(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 and the switch on.

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