5

LM2758

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SNVS551E – APRIL 2008 – REVISED MAY 2016

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Copyright © 2008–2016, Texas Instruments Incorporated

(1)

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

(2)

Minimum (MIN) and maximum (MAX) limits are specified by design, test, or statistical analysis. Typical (TYP) numbers are not ensured,

but do represent the most likely norm. Unless otherwise specified, conditions for TTYP specifications are: VIN = 3.6 V and TA = 25°C.

(3)

CIN, COUT, C1, C2: Low-ESR surface-mount ceramic capacitors (MLCCs) used in setting electrical characteristics.

(4)

Output voltage is internally limited not to exceed maximum specified value.

(5)

These table entries are specified by design. These parameters are not ensured by production testing. The temperature limits for test are

(–40°C

≤ TA ≤ +85°C).

(6)

The temperature limits for ISD (shutdown current) test are -40°C ≤ TA ≤ +85°C, as in shutdown mode ambient temperature is equal to

junction temperature.

(7)

The timeout specifications are calculated values based on the switching frequency spread.

6.5 Electrical Characteristics

Unless otherwise specified, aspecifications apply to the Figure 8 with VIN = 3.6 V, VEN1 = VIN, VEN2 = 0 V,

C1 = C2 = 1 µF, CIN = COUT = 2.2 µF, RSET = 20 kΩ, TJ = 25°C.

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ILED

LED current accuracy

ILED = 500 mA, flash mode

500

ILED = 500 mA, flash mode

–40°C

≤ TJ ≤ 125°C

450

550

mA

VSET

ISET pin voltage

1.3

V

ID/ISET

LED current to set current

ratio

Flash mode

7650

Torch mode

1639

ILED-IND

Indicator current level

Indicator mode

32-kHZ PWM mode

1/32 ×

ILED-

TORCH

mA

VGDX

1× to 1.5× gain transition

voltage threshold on VLED–

IOUT = 500 mA

300

mV

VOUT

Output voltage

1× mode, IOUT = 0 mA

VIN

V

1.5× mode, IOUT = 0 mA

(4)

4.8

1.5× mode, IOUT = 0 mA

–40°C

≤ TJ ≤ 125°C

(4)

5.3

ROUT

1× mode output impedance

IOUT = 200 mA, VIN = 3.3 V

–40°C

≤ TJ ≤ 125°C

0.33

Ω

IOUT = 200 mA, VIN = 3.3 V

(5)

0.53

1.5× mode output

impedance

IOUT = 500 mA, VIN = 3.3 V

(5)

1.5

2.0

FSW

Switching frequency

1.25

MHz

–40°C

≤ TJ ≤ 125°C

0.8

1.5

IQ

Quiescent current

IOUT = 0 mA 1× mode, –40°C ≤ TJ ≤ 125°C

0.7

mA

IOUT = 0 mA 1x mode

0.8

IOUT = 0 mA 1.5× mode

4

IOUT = 0 mA 1.5× mode, –40°C ≤ TJ ≤ 125°C

5

ISD

Shutdown current

Device disabled(6)

0.01

µA

Device disabled, –40°C

≤ TJ ≤ 125°C

(6)

1

TOUT

Timeout duration

–40°C

≤ TJ ≤ 125°C, see

(7)

814

msec

See(7)

640

1000

VIH

Input logic high

Pins: EN1, EN2, –40°C

≤ TJ ≤ 125°C

1.2

V

VIL

Input logic low

Pins: EN1, EN2, –40°C

≤ TJ ≤ 125°C

0.4

V