SC4612HMLTRT Просмотр технического описания (PDF) - Semtech Corporation

Номер в каталоге

Компоненты Описание

производитель

SC4612HMLTRT

40V Synchronous Buck Controller

Semtech Corporation 

SC4612H

Absolute Maximum Ratings

VDD (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +45

PHASE to GND(V). . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +55

EAO, SS/EN, FB, OSC(V). . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +5

Pin Voltage - All Other Pins (V). . . . . . . . . . . . . . . . -0.3 to +10

DRV Source Current (peak) (mA). . . . . . . . . . . . . . . . . . . . . 100

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

Recommended Operating Conditions

Supply Voltage Range (VDD) (V). . . . . . . . . . . . . . . . 5 to +40

Thermal Information

Rqja (SOIC)(2) (°C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Rqja (MLPD)(2) (°C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.3

Rqjc (SOIC) (°C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Rqjc (MLPD) (°C/W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

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

Ambient Temperature Range (°C). . . . . . . . . . . -40 to +105

Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . . +260

Exceeding the Absolute Maximum Ratings may result in permanent damage to the device or device malfunction. Operation outside of the Rec-

ommended Operating Conditions 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”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

Electrical Characteristics

Unless otherwise specified, TA = TJ = +25°C, VIN = VVDD=12V

Parameter

Bias Supply

Quiescent Current

VDD Undervoltage Lockout

Start Threshold

UVLO Hysteresis

Drive Regulator

DRV Output Voltage

Load Regulation

Oscillator

Operating Frequency Range

Initial Accuracy(1)

Maximum Duty Cycle

Ramp Peak to Valley (1)

Oscillator Charge Current

Symbol

Conditions

Min Typ Max Units

IQ

VVDD = 40V, No load, VSS/EN = 0V

5

7

mA

VUVLO

VUVLO-HYST

4.20 4.50 4.75

V

400

mV

VDRV

10V≤ VVDD ≤ 40V, IDRV ≤ 1mA

7.3 7.8

8.3

V

1mA≤ IDRV ≤ 70mA

100

mV

fOSC

VRAMP

IOSC

100

1200 kHz

COSC=160pF (Ref only)

540 600 660 kHz

VVDD=VDRV=8V; VOUT_NOM=5V; IOUT=0A; VVDD adjusted

82

%

down to VOUT=0.99*VOUT_NOM

850

mV

VOSC=1V

90

110

mA



Share Link: