SC2442H

Dual Synchronous Buck Controller

The SC2442H is a dual synchronous buck controller from Semiment. View the full SC2442H datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

SC2442H shares its datasheet with SC2442, whose page lists every part number it covers.

Official SC2442H datasheet (PDF) — the source this page was extracted from.

Manufacturer

Semiment

SC2442H Key Specifications

Parameter	Value
Dead Time	100 ns typ
Maximum VIN	36V
Output Voltage	Down to 0.75V
Number Of Outputs	2
Operating Current	8 mA typ, 13 mA max
Gate Drive Current	0.5A source/sink
Maximum Duty Cycle	94% typ
Input Voltage Range	4.5V to 36V
UVLO Start Threshold	4.6V typ (AVCC rising)
Switching Frequency Range	0.1 MHz to 1 MHz
Feedback Reference Voltage	0.750V (0.735V to 0.765V)
AVCC/PVCC Regulated Voltage	7V (6.7V to 7.3V)
Operating Temperature Range	-40°C to +125°C
Soft Start Charging Current	10 μA typ
Clock Frequency (ROSC = 60K)	500 kHz
Current Limit Sense Threshold	-105 mV typ

SC2442H Overview

Part: SC2442/H — Semtech Corporation

Type: Dual Synchronous Buck Controller

Description: High performance dual buck converter controller that can be configured for synchronous buck applications, operating out of phase for reduced input ripple, with a wide input range of 4.5 to 30V for SC2442 and 4.5 to 36V for SC2442H, and programmable clock frequency up to 1 MHz.

Operating Conditions:

Supply voltage: 4.5–30V (SC2442), 4.5–36V (SC2442H)
Operating temperature: -40 to +125 °C
Clock frequency: 0.1 to 1 MHz

Absolute Maximum Ratings:

Max BST1, BST2 to PGND voltage: 38 V (SC2442), 44 V (SC2442H)
Max PVCC, AVCC to PGND voltage: 8 V
Max junction temperature: +125 °C
Max storage temperature: +150 °C

Key Specs:

Undervoltage Lockout Start Threshold (AVCC rising): 4.5 V (min), 4.6 V (typ), 4.75 V (max)
AVCC/PVCC Regulated Voltage: 6.7 V (min), 7 V (typ), 7.3 V (max)
Voltage Feedback Reference (VFB1, VFB2): 0.735 V (min), 0.750 V (typ), 0.765 V (max)
Oscillator Frequency Range: 0.1 MHz (min), 1 MHz (max)
OC1, OC2 Current Limit Sense: -80 mV (min), -105 mV (typ), -125 mV (max)
High Side Gate Drive Source/Sink Current: 0.5 A (typ)
Low Side Gate Drive Source/Sink Current: 0.5 A (typ)
Maximum Duty Cycle: 85 % (min), 94 % (typ)

Features:

Dual output controller
Asynchronous start up mode
Power up sequencing to prevent latch-ups
Out of phase operation for low input ripple
Over current protection
Output down to 0.75V
Vcc regulator with external PNP transistor
Programmable clock frequency up to 1MHz
Two synchronous bucks for high efficiency at high current

Applications:

Point of load converter applications
DSL applications with multiple output voltages
Power management for mixed signal applications
Cable modems and set top boxes

Package:

TSSOP-24

SC2442H Features

u Dual output controller
u Asynchronous start up mode
u Power up sequencing to prevent latch-ups
u Out of phase operation for low input ripple
u Over current protection
u Output down to 0.75V
u Wide input range, 4.5 to 30V for SC2442 and 4.5 to 36V for SC2442H
u Vcc regulator with external PNP transistor
u Programmable clock frequency up to 1MHz
u Two synchronous bucks for high efficiency at high current
u -40 to +125 Deg C operating temperature
u Small package TSSOP-24

SC2442H Applications

u Point of load converter applications
u DSL applications with multiple output voltages
u Power management for mixed signal applications
u Cable modems and set top boxes.

SC2442H Pin Configuration

SC2442H Electrical Characteristics

Unless specified: T A = T J = -40 to 125°C, VIN = 24V, V CC = 7V, fc = 500KHz

Parameter	Symbol	Test Conditions	Min	Typ	Max	Unit
Undervoltage Lockout
Start Threshold	V UVLO	AVCC rising	4.5	4.6	4.75	V
UVLO Hysteresis	V HYST	AVCC falling		0.15		V
Power Supply
Operating Current	I QSC	No load, SYNC/EN = Low		8	13	mA
AVCC/PVCC Regulated	AVCC, PVCC	VIN > 8V	6.7	7	7.3	V
BDI Drive Current	I BDI	VIN > AVCC + 2V	3	5		mA

SC2442H Absolute Maximum Ratings

Exceeding the specifications below may result in permanent damage to the device, or device malfunction.

Operation outside of the parameters specified in the Electrical Characteristics section is not implied.

Parameter	Symbol	Maximum	Units
BST1, BST2 to PGND SC2442 SC2442H	V BST1, V BST2	38 44	V
VIN to PGND SC2442 SC2442H	VIN	30 36	V
BDI to PGND	V BDI	VIN	V
OC1 and OC2 to VIN	VIN - V OC1 , VIN - V OC2	-0.3 to +0.5	V
PVCC, AVCC to PGND	PVCC, AVCC	8	V
BST1 to PH1, BST2 to PH2 GD1H to PH1, GD2H to PH2		-0.3 to 8	V
GD1L, GD2L to PGND		-0.3 to PVCC	V
PGND to AGND		±0.3	V
PH1, PH2 -ve swing wrt PGND (for 100 nS)	V PH1, V PH2	-1	V
All Other Pins to AGND		-0.3 to AVCC	V
Junction Temperature		-40 to +125	°C
Storage Temperature Range		-60 to +150	°C
Lead Temperature (Soldering) 10 Sec.		260	°C

SC2442H Typical Application

SC2442H Package Information

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part Number	Manufacturer	Package
SC2442	Semiment	TSSOP-24
SC2442/H	Semtech	TSSOP-24
SC2442ITSTR	Semiment	TSSOP-24
SC2442UA	Semiment	TSSOP-2

More datasheets

All Semiment datasheets (4)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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