L6732C

Switching Frequency :
Output Current :
Duty Cycle (Max) :
Mounting Style :
Number of Outputs : 1
Maximum Operating Temperature : + 85 C
Input Voltage : 1.8 V to 14 V
Output Voltage : 0.6 V to 18 V
Package / Case : HTSSOP EP-16


Features:

INPUT VOLTAGE RANGE FROM 1.8V TO 14V
SUPPLY VOLTAGE RANGE FROM 4.5V TO 14V
ADJUSTABLE OUTPUT VOLTAGE DOWN TO 0.6V WITH ±0.8% ACCURACY OVER LINE VOLTAGE AND TEMPERATURE (0°C~125°C)
FIXED FREQUENCY VOLTAGE MODE CONTROL
TON LOWER THAN 100ns
0% TO 100% DUTY CYCLE
EXTERNAL INPUT VOLTAGE REFERENCE
SOFT-START AND INHIBIT
HIGH CURRENT EMBEDDED DRIVERS
PREDICTIVE ANTI-CROSS CONDUCTION CONTROL
PROGRAMMABLE HIGH-SIDE AND LOWSIDE RDSON SENSE OVER-CURRENTPROTECTION
SELECTABLE SWITCHING FREQUENCY 250KHz/500KHz
PRE-BIAS START UP CAPABILITY
POWER GOOD OUTPUT
MASTER/SLAVE SYNCHRONIZATION WITH 180° PHASE SHIFT
OVER VOLTAGE PROTECTION
THERMAL SHUT-DOWN
PACKAGE: HTSSOP16


Application

HIGH PERFORMANCE / HIGH DENSITY DCDC MODULES
LOW VOLTAGE DISTRIBUTED DC-DC
niPOL CONVERTERS
DDR MEMORY SUPPLY
GRAPHIC CARDS


Specifications

Symbol	Parameter	Value	Unit
VCC	VCC to GND and PGND, OCH, PGOOD	-0.3 to 18	V
VBOOT - VPHASE	Boot Voltage	0 to 6	V
VHGATE - VPHASE		0 to VBOOT - VPHASE	V
VBOOT	BOOT	-0.3 to 24	V
VPHASE	PHASE	-1 to 18	V
	PHASE Spike, transient < 50ns (FSW = 500KHz)	-3
		+24
	SS, FB, EAREF, SYNC, OCL, LGATE, COMP, VCCDR	-0.3 to 6	V
OCH Pin	Maximum Withstanding Voltage Range Test Condition: CDF-AEC-Q100-002 "Human Body Model" Acceptance Criteria: "Normal Performance"	±1500	V
PGOOD Pin		±1000
OTHER PINS		±2000

Description

L6732C is an integrated circuit realized in BCD5 (BiCMOS-DMOS, version 5) fabrication that provides complete control logic and protection for high performance step-down DC-DC and niPOL converters.

L6732C is designed to drive N-Channel MOSFETs in a synchronous rectified buck topology. The output voltage of the converter can be precisely regulated down to 600mV with a maximum tolerance of ±0.8% and it is also possible to use an external reference from 0V to 2.5V.

The input voltage can range from 1.8V to 14V, while the supply voltage can range from 4.5V to 14V. High peak current gate drivers provide for fast switching to the external power section, and the output current can be in excess of 20A. The PWM duty cycle can range from 0% to 100% with a minimum on-time (TON, MIN) lower than 100ns making possible conversions with very  low duty cycle at high switching frequency. L6732C provides voltage-mode control that includes a selectable frequency oscillator (250KHz or 500KHz).

The error amplifier features a 10MHz gain-bandwidth-product and 5V/s slew-rate that permits to realize high converter bandwidth for fast transient response. L6732C monitors the current by using the R _DS(ON) of both the high-side and low-side MOSFET(s), eliminating the need for a current sensing resistor and guaranteeing an effective over-current-protection in all the application conditions. When necessary, two different current limit protections can be externally set through two external resistors.

During the soft-start phase a constant current protection is provided while after the soft-start the device enters in hiccup mode in case of over-current. During the soft-start, the sink mode capability is disabled in order to allow a proper start-up also in pre-biased output voltage conditions. After the soft-start the device can sink current. Other features of the L6732C are Power-Good,  Master/Slave synchronization (with 180° phase shift), over-voltage-protection, feed-back disconnection and thermal shutdown. The HTSSOP16 package allows the realization of really compact DC/DC converters.

Parameters:

Technical/Catalog Information	L6732C
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	1.8 ~ 14 V
Voltage - Output	Adj down to 0.6V
Current - Output	20A
Power - Output	-
Package / Case	16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
Packaging	Tube
Internal Switch(s)	No
Synchronous	Yes
Rds (On)	-
Operating Temperature	-40°C ~ 85°C
Frequency - Switching	250kHz, 500kHz
Drawing Number	*
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L6732C L6732C