LM3553

SNVS414B – FEBRUARY 2008 – REVISED MAY 2013

www.ti.com

Electrical Characteristics

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

(-30°C

≤ TJ ≤ +125°C). Unless otherwise noted: VIN = 3.6V, RSET = 16.5kΩ, VD1 = VD2 = 500mV, VFB bit = '0', FEN = '0', TX =

'0', Flash Current Level = Full-Scale.

(1) (2) (3)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Flash Mode

930

1020

1110

VDX = Regulation Voltage

Flash LED Current:

ILED-SUM

mA

Flash Mode

ID1+ ID2

VDX = Regulation Voltage

1200

RSET = 13.7k

Ω

ILED-IND

Indicator Current Level

Indicator Mode

20

mA

Output Voltage Regulation in

VM = '1', EN1 = EN0 = '0'

VMREG

4.65

4.98

5.30

V

Voltage Mode

No Load

VD1,D2 = 0V

IQ

Quiescent Supply Current

1.0

1.2

mA

(Switching)

ISD

Shutdown Supply Current

Device Disabled

3.8

6.0

µA

LED Current to Set Current

IDx / ISET

IDx= 500mA

6770

A / A

Ratio

VSET

ISET Pin Voltage

1.24

V

VFB Bit = '0'

450

Current Sink Regulation

VD1,D2

mV

Voltage

VFB Bit = '1'

350

IDx-MATCH

Current Sink Matching

VDX = Regulation Voltage

2

%

RDSON

NMOS Switch Resistance

0.25

Ω

OCL Bit = '0'

2.2

2.5

2.8

ICL

NMOS Switch Current Limit

A

OCL Bit = '1'

1.53

1.70

1.87

Switch Off, VSW=3.6V, OVP

IL-SW

SW Pin Leakage Current

10

nA

Mode = '0'

IL-Dx

D1, D2 Pin Leakage

VDx = 3.5V

10

nA

OVP Mode = '1'

18.00

18.90

19.65

Output Over-Voltage

VOVP

V

Protection Trip Point

OVP Mode = '0'

5.4

5.6

5.85

Over-Voltage Protection

OVP Mode = '1'

1.6

OVPHyst

Hysteresis

V

OVP Mode = '0'

0.6

OVP to Normal Operation

IL-OVP

OVP Pin Leakage Current

VOVP=3.6V

10

nA

fSW

Switching Frequency

1.0

1.2

1.35

MHz

tFD-MIN

Minimum Flash Duration Step

tFD-MIN = 16 ÷ fSW

12.8

µsec.

DMAX

Maximum Duty Cycle

92

%

DMIN

Minimum Duty Cycle

6

%

On

1.0

VIN

ThTX,F-EN

TX, FEN Pin Threshold

V

Off

0

0.6

Multi-Function Pin (M/F) Voltage Specifications

Input Logic High "1"

0.94

VIN

Multi-Function Pin Threshold

VM/F

V

Voltages

Input Logic Low "0"

0

0.64

ILOAD = 4.2mA,

VOL

Output Logic Low "0"

400

mV

GPIO Mode

I2C Compatible Voltage Specifications (SCL, SDIO, VIO)

VIO

Serial Bus Voltage Level

1.45

VIN

V

VIL

Input Logic Low "0"

VIO = 3.0V

0

0.38 ×VIO

V

VIH

Input Logic High "1"

VIO = 3.0V

0.55 × VIO

VIO

V

VOL

Output Logic Low "0"

ILOAD = 3.7mA

400

mV

(1)

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

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical (Typ) numbers represent the most likely norm. Unless

otherwise specified, conditions for Typ specifications are: VIN = 3.6V and TA = 25ºC.

(3)

All testing for the LM3553 is done open-loop.

4

Submit Documentation Feedback

Copyright © 2008–2013, Texas Instruments Incorporated

Product Folder Links: LM3553