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Fabricante

SC4524D

18V 2A Step-Down Switching Regulator

Semtech Corporation 

SC4524D

Absolute Maximum Ratings

Thermal Information

VIN Supply Voltage ……………………………… -0.3 to 24V

BST Voltage ……………………………………………… 40V

BST Voltage above SW …………………………………… 36V

SS Voltage ……………………………………………-0.3 to 3V

FB Voltage …………………………………………… -0.3 to VIN

SW Voltage ………………………………………… -0.6 to VIN

SW Transient Spikes (10ns Duration)……… -2.5V to VIN +1.5V

Peak IR Reflow Temperature …………………………. 260°C

ESD Protection Level(2) ………………………………… 2000V

Junction to Ambient (1) ……………………………… 36°C/W

Junction to Case (1) ………………………………… 5.5°C/W

Maximum Junction Temperature……………………… 150°C

Storage Temperature ………………………… -65 to +150°C

Lead Temperature (Soldering) 10 sec ………………… 300°C

Recommended Operating Conditions

Input Voltage Range ……………………………… 3V to 18V

Maximum Output Current ……………………………… 2A

Operating Ambient Temperature …………… -40 to +105°C

Operating Junction Temperature …………… -40 to +125°C

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

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

Electrical Characteristics

Unless otherwise noted, VIN = 12V, VBST = 15V, VSS = 2.2V, -40°C < TJ < 125°C, ROSC = 12.1kΩ.

Parameter

Conditions

Min

Typ

Max Units

Input Supply

Input Voltage Range

3

18

V

VIN Start Voltage

VIN Start Hysteresis

VIN Quiescent Current

VIN Quiescent Current in Shutdown

Error Amplifier

Feedback Voltage

Feedback Voltage Line Regulation

FB Pin Input Bias Current

Error Amplifier Transconductance

Error Amplifier Open-loop Gain

COMP Pin to Switch Current Gain

COMP Maximum Voltage

COMP Source Current

COMP Sink Current

Internal Power Switch

VIN Rising

VCOMP = 0 (Not Switching)

VSS/EN = 0, VIN = 12V

VIN = 3V to 18V

VFB = 1V, VCOMP = 0.8V

VFB = 0.9V

VFB = 0.8V, VCOMP = 0.8V

VFB = 1.2V, VCOMP = 0.8V

2.70

2.82

2.95

V

225

mV

2

2.6

mA

40

52

µA

0.980 1.000 1.020

V

0.005

%/V

-170

-340

nA

300

µΩ-1

60

dB

10

A/V

2.4

V

17

µA

25

Switch Current Limit

(Note 1)

2.6

3.3

4.3

A

Switch Saturation Voltage

ISW = -2.6A

250

400

mV



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