LM3676

SNVS426B – NOVEMBER 2006 – REVISED MARCH 2007

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Electrical Characteristics

(1) (2) (3)

(

Symbol

Parameter

Condition

Min

Typ

Max

Units

-4

+4

%

Line Regulation

2.9V

0.031

%/V

Load Regulation

100 mA

0.0013

%/mA

Internal Reference Voltage

0.5

V

Shutdown Supply Current

EN = 0V

0.01

2

µA

No load, device is not switching

16

35

µA

(FB forced higher than

programmed output voltage)

Pin-Pin Resistance for PFET

380

500

m

Ω

Pin-Pin Resistance for NFET

250

400

m

Ω

Open Loop

830

1020

1200

mA

Logic High Input for EN and Mode Pin

1.0

V

Logic Low Input for EN and Mode Pin

0.4

V

Enable (EN) Input Current

0.01

1

µA

Mode Pin Input Current

0.01

1

µA

Internal Oscillator Frequency

PWM Mode

1.6

2

2.6

MHz

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are guaranteed by design, test or statistical analysis. Typical numbers are not guaranteed, but do represent the most

likely norm.

(3)

voltage range refer to datasheet curves.

(4)

(5)

Refer to datasheet curves for closed loop data and its variation with regards to supply voltage and temperature. Electrical Characteristic

table reflects open loop data (FB=0V and current drawn from SW pin ramped up until cycle by cycle current limit is activated). Closed

loop current limit is the peak inductor current measured in the application circuit by increasing output current until output voltage drops

by 10%.

4

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