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L6995S, L6997S, L69B

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Info of L6995S
Info of L6997S
Info of L69B

L6995S, L6997S, L69B Selling Leads, Datasheet

MFG:STMicroelectronics Category:Integrated Circuits (ICs) Package Cooled:TSSOP20 D/C:2008+

L6995S, L6997S, L69B Datasheet download

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Part Number: L6997S

Category: Integrated Circuits (ICs)

MFG: STMicroelectronics

Package Cooled: TSSOP20

D/C: 2008+

Description: IC CTRLR STEP-DOWN LV 20-TSSOP

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L6995S General Description

The device is a step-down controller specifically designed to provide extremely high efficiency conversion, with losses current sensing tecnique. The "constant on-time" topology assures fast load transient response. The embedded "voltage feed-forward" provides nearly constant switching frequency operation.

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

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

L6995S Maximum Ratings

Symbol	Parameter	Value	Unit
V_CC	V_CC to GND	-0.3 to 6	V
V_DR	V_DR 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	PHAS	-0.3-to 36	V
	LGATE to PGND	-0.3 to V_DR+0.3	V
	ILIM, VFB, VSENSE, NOSKIP, SHDN, PGOOD, OVP, VREF, INT, GNDSENSE to GND	-0.3 to V_CC+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
T_stg	Storage temperature range	-40 to 150

L6995S Features

CONSTANT ON TIME TOPOLOGY ALLOWS OPERATION WITH LOWER DUTY THAN PWM TOPOLOGY
VERY FAST LOAD TRANSIENTS
5V Vcc SUPPLY
1.5V TO 35V INPUT VOLTAGE RANGE
0.9V ±1% VREF
MINIMUM OUTPUT VOLTAGE AS LOW AS 0.9V
SELECTABLE SINKING MODE
LOSSLESS CURRENT LIMIT
REMOTE SENSING
OVP,UVP LATCHED PROTECTIONS
600A TYP QUIESCENT CURRENT
POWER GOOD AND OVP SIGNALS
PULSE SKIPPING AT LIGHT LOADS

L6995S Typical Application

I/O BUS FOR CPU CORE SUPPLY
NOTEBOOK COMPUTERS
NETWORKING DC-DC
DISTRIBUTED POWER

L6997S 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

L6997S General Description

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

It'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.

L6997S Maximum Ratings

Symbol	Parameter	Value	Unit
V_CC	V_CC to GND	-0.3 to 6	V
V_DR	V_DR 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
V_PHASE	PHASE	-0.3-to 36	V
	LGATE to PGND	0.3 to V_DR+0.3	V
	ILIM, VFB, VSENSE, NOSKIP, SHDN, PGOOD, OVP, VREF, INT, GND_SENSE to GND	-0.3 to V_CC+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
P_tot	Power dissipation at T_amb= 25°C	1	W
T_stg	Storage temperature range	-40 to 150	°C

L6997S Features

` FROM 3V TO 5.5V V_CC 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

L6997S Typical Application

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

L6997S Connection Diagram

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