LM3208TLXSLASHNOPB datasheet(4/25 Pages) TI1

4 / 25 page

LM3208

SNVS404B – APRIL 2006 – REVISED MARCH 2013

www.ti.com

ELECTRICAL CHARACTERISTICS

(1) (2) (3)

Limits in standard typeface are for TA = TJ = 25°C. Limits in boldface type apply over the full operating ambient temperature

range (

−30°C ≤ TA = TJ ≤ +85°C). Unless otherwise noted, all specifications apply to the LM3208 with: PVIN = VDD = EN =

3.6V.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VFB, MIN

Feedback Voltage at minimum

VCON = 0.32V

(3)

0.75

0.80

0.85

setting

VFB, MAX

Feedback Voltage at maximum

VCON = 1.44V, VIN = 4.2V

(3)

3.537

3.600

3.683

setting

ISHDN

Shutdown supply current

EN = SW = VCON = 0V,

(4)

0.01

µA

DC bias current into VDD

VCON = 0V, FB = 0V,

0.6

0.7

No Switching(5)

RDSON(P)

Pin-pin resistance for Large PFET

ISW = 200mA, VCON = 0.5V

180

140

Ω

210

RDSON(P)

Pin-pin resistance for Small PFET

ISW = 200mA, VCON = 0.32V

960

Ω

RDSON(N)

Pin-pin resistance for NFET

ISW = –200mA, VCON = 0.5V

375

300

Ω

450

ILIM

Large PFET (L) Switch peak current

VCON = 0.5V

(6)

985

1100

1200

(L_PFET)

limit

ILIM

Small PFET (S) Switch peak current

VCON = 0.32V

(6)

650

800

900

(S_PFET)

limit

FOSC

Internal oscillator frequency

1.8

2.0

2.2

MHz

VIH,EN

Logic high input threshold

1.2

VIL,EN

Logic low input threshold

0.5

IPIN,EN

EN pin pull down current

µA

VCON,ON

VCON Threshold for turning on

0.15

switches

ICON

VCON pin leakage current

VCON = 1.0V

±1

µA

Gain

VCON to VOUT Gain

0.32V

≤ VCON ≤ 1.44V

2.5

V/V

(1)

All voltages are with respect to the potential at the GND pins. The LM3208 is designed for mobile phone applications where turn-on after

power-up is controlled by the system controller and where requirements for a small package size overrule increased die size for internal

Under Voltage Lock-Out (UVLO) circuitry. Thus, it should be kept in shutdown by holding the EN pin low until the input voltage exceeds

2.7V.

(2)

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

likely norm. Due to the pulsed nature of the testing TA = TJ for the electrical characteristics table.

(3)

The parameters in the electrical characteristics table are tested under open loop conditions at PVIN = VDD = 3.6V unless otherwise

specified. For performance over the input voltage range and closed-loop results, refer to the datasheet curves.

(4)

Shutdown current includes leakage current of PFET.

(5)

IQ specified here is when the part is not switching. For operating quiescent current at no load, refer to datasheet curves.

(6)

Current limit is built-in, fixed, and not adjustable. Electrical Characteristic table reflects open loop data (FB = 0V and current drawn from

SW pin ramped up until cycle by cycle limit is activated). Refer to SYSTEM CHARACTERISTICS table for maximum output current.

Submit Documentation Feedback

Product Folder Links: LM3208

LM3208TLX/NOPB Arkusz danych(PDF) 4 Page - Texas Instruments

LM3208TLX/NOPB Arkusz danych(HTML) 4 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

Arkusz danych Pobierz

Link URL