SC4541 データシートの表示（PDF） - Semtech Corporation

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SC4541

High Frequency LED Driver with Integrated Schottky and Simple Interconnect

Semtech Corporation 

SC4541

Absolute Maximum Ratings

Supply IN Voltage(V) . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 26

SW Voltage, OUT Voltage(V) . . . . . . . . . . . . . . . . . -0.3 to 28

FB, Enable Voltage(V) . . . . . . . . . . . . . . . . . . . . . -0.3 to VIN+0.3

ESD Protection Level(1)(kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Recommended Operating Conditions

Supply IN Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 to 22

Maximum Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . 25

Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85

Thermal Information

Thermal Resistance, Junction to Ambient(2)

MLPD-UT6(°C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

SOT23-6(°C/W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +125

Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . . +300

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

NOTES:

(1) Tested according to JEDEC standard JESD22-A114-B.

(2) Calculated from package in still air, mounted to 3 x 4.5(in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

Electrical Characteristics

VIN =5V, CIN=1uF, COUT=1uF, L=10uH, TA= -40°C to 85°C, unless specified otherwise.

Parameter

Symbol

Conditions

Min Typ Max Units

Input Voltage

Supply Current

Shutdown Supply Current

EN Logic High Voltage

EN Logic Low Voltage

EN Logic Bias Current

Boost Converter Characteristics

VIN

2.9

22

V

IIN(Q)

VIN=22V, VOUT=18V, VFB=17V, EN=3V

1.5

3

mA

IIN(SHDN)

EN=0V

1

µA

VEN(H)

2

V

VEN(L)

0.4

V

I I EN(L), EN(H)

1

µA

Switching Frequency

Maximum Duty Cycle

Switch Current limit

Switch Leakage Current

Switch Saturation Voltage

OUT Over-Voltage Protection

Schottky Forward Drop

fSW

DMAX

ILIMIT

ISW

VSAT

VOUT(OVP)

VF(D)

VSW = 18V

ISW = 0.2A

TA=25°C

IOUT = 100mA, TA=25°C

1.6 2.0

2.4 MHz

84

%

260 350

450

mA

0.1

5

µA

200

mV

25.5

28.0

V

0.7

V

3

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