LM3671_15 datasheet(6/36 Pages) TI

Teilenummer	LM3671

Bauteilbeschribung	LM3671/-Q1 2-MHz, 600-mA Step-Down DC-DC Converter6

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LM3671, LM3671-Q1

SNVS294R – NOVEMBER 2004 – REVISED NOVEMBER 2014

www.ti.com

6.7 Electrical Characteristics

Unless otherwise noted, limits apply for for TJ = 25°C, and specifications apply to the LM3671MF/TL/LC with VIN = EN = 3.6

V

(1) (2) (3)

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

VIN

Input voltage

−40°C to 125°C, see(4)

2.7

5.5

V

Feedback voltage (fixed) MF

−4%

4%

Feedback voltage (fixed) TL

PWM mode(5),

−40°C to 125°C

−2.5%

2.5%

Feedback voltage (fixed) LC

−4%

4%

VFB

Feedback voltage (ADJ) MF(6)

−4%

4%

PWM mode(5),

−40°C to 125°C

Feedback voltage (ADJ) TL

−2.5

2.5

Line regulation

2.7 V

≤ VIN ≤ 5.5 V, IO = 10 mA

0.031

%/V

Load regulation

100 mA

≤ IO ≤ 600 mA, VIN = 3.6 V

0.0013

%/mA

VREF

Internal reference voltage

0.5

V

EN = 0 V

0.01

ISHDN

Shutdown supply current

µA

EN = 0 V,

−40°C to 125°C

1

No load, device is not switching (FB

forced higher than programmed output

16

voltage)

IQ

DC Bias Current into VIN

µA

No load, device is not switching (FB

forced higher than programmed output

35

voltage),

−40°C to 125°C

RDSON (P)

Pin-pin resistance for PFET

VIN = VGS= 3.6 V

380

500

m

Ω

RDSON (N)

Pin-pin resistance for NFET

VIN = VGS= 3.6 V

250

400

m

Ω

Open loop(7)

1020

ILIM

Switch peak current limit

mA

Open loop(7),

−40°C to 125°C

830

1150

VIH

Logic high input

−40°C to 125°C

1

V

VIL

Logic low input

−40°C to 125°C

0.4

V

0.01

IEN

Enable (EN) input current

µA

−40°C to 125°C

1

PWM Mode(5)

2

FOSC

Internal oscillator frequency

MHz

PWM Mode(5),

−40°C to 125°C

1.6

2.6

(1)

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

likely norm.

(2)

The parameters in the electrical characteristic table are tested at VIN = 3.6 V unless otherwise specified. For performance over the input

voltage range refer to datasheet curves.

(3)

Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ= 150°C (typ.) and

disengages at TJ= 130°C (typ.).

(4)

The input voltage range recommended for ideal applications performance for the specified output voltages are given below: VIN = 2.7 V

to 4.5 V for 1.1 V

≤ VOUT < 1.5 VIN = 2.7 V to 5.5 V for 1.5 V ≤ VOUT < 1.8 VIN = (VOUT + VDROPOUT) to 5.5 V for 1.8 V ≤ VOUT ≤ 3.3 V

where VDROPOUT = ILOAD × (RDSON, PFET + RINDUCTOR).

(5)

Test condition: for VOUT less than 2.5 V, VIN = 3.6 V; for VOUT greater than or equal to 2.5 V, VIN = VOUT + 1 V.

(6)

ADJ version is configured to 1.5 V output. For ADJ output version: VIN = 2.7 V to 4.5 V for 0.90 V ≤ VOUT < 1.1 VIN = 2.7 V to 5.5 V for

1.1 V

≤ VOUT < 3.3 V

(7)

Refer to Typical Characteristics for closed loop data and its variation with regards to supply voltage and temperature. Electrical

Characteristic table reflects open loop data (FB = 0 V 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%.

6

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