L6997S

Switching Frequency :
Duty Cycle (Max) :
Mounting Style : SMD/SMT
Maximum Operating Temperature : + 125 C
Number of Outputs : 2
Package / Case : TSSOP-20
Output Current : 30 A
Input Voltage : 1 V to 35 V
Output Voltage : 0.6 V to 12 V


Features:

` FROM 3V TO 5.5V V<sub>CC</sub> RANGE
` MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V
` 1V TO 35V INPUT VOLTAGE RANGE
` CONSTANT ON TIME TOPOLOGY
` VERY FAST LOAD TRANSIENTS
` 0.6V, ±1% VREF
` SELECTABLE SINKING MODE
` LOSSLESS CURRENT LIMIT, AVAILABLE ALSO IN SINKING MODE
` REMOTE SENSING
` OVP,UVP LATCHED PROTECTIONS
` 600A TYP QUIESCENT CURRENT
` POWER GOOD AND OVP SIGNALS
` PULSE SKIPPING AT LIGTH LOADS
` 94% EFFICIENCY FROM 3.3V TO 2.5V


Application

· NETWORKING
· DC/DC MODULES
· DISTRIBUTED POWER
· MOBILE APPLICATIONS
· CHIP SET, CPU, DSP AND MEMORIES SUPPLY


Pinout




Specifications

Symbol	Parameter	Value	Unit
VCC	VCC to GND	-0.3 to 6	V
VDR	VDR to GND	-0.3 to 6	V
	HGATE and BOOT, to PHASE	-0.3 to 6	V
	HGATE and BOOT, to PGND	-0.3 to 42	V
VPHASE	PHASE	-0.3-to 36	V
	LGATE to PGND	0.3 to VDR+0.3	V
	ILIM, VFB, VSENSE, NOSKIP, SHDN, PGOOD, OVP, VREF, INT, GNDSENSE to GND	-0.3 to VCC+0.3	V
BOOT, HGATE   and PHASE      PINS	Maximum Withstanding Voltage Range Test Condition:CDF-AEC-Q100-002 "Human Body Model" Accepatance Criteria: "Normal Performance"	±750	V
OTHER PINS		±2000	V
Ptot	Power dissipation at Tamb = 25°C	1	W
Tstg	Storage temperature range	-40 to 150	°C

Description

L6997S is a high efficient solution for networking dc/dc modules and mobile applications compatible with 3.3V bus and 5V bus.

L6997S's able to regulate an output voltage as low as 0.6V. The constant on time topology assures fast load transient response. The embedded voltage feed-forward provides nearly constant switching frequency operation in spite of a wide input voltage range.

An integrator can be introduced in the control loop to reduce the static output voltage error.

The remote sensing improves the static and dynamic regulation, recovering the wires voltage drop. Pulse skipping technique reduces power consumption at light loads. Drivers current capability allows output currents in excess of 20A.

Parameters:

Technical/Catalog Information	L6997S
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	1 ~ 35 V
Voltage - Output	Adj down to 0.6V
Current - Output	20A
Power - Output	1W
Package / Case	20-TSSOP
Packaging	Tube
Internal Switch(s)	No
Synchronous	Yes
Rds (On)	-
Operating Temperature	0°C ~ 85°C
Frequency - Switching	-
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	L6997S L6997S