LTC1142HVCG#PBF datasheet, PDF

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LTC1142HVCG#PBF: DescriptionDC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube; File Size245KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC1142HVCG#PBF Overview

DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube

LTC1142HVCG#PBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Number of Outputs	2
Topology	Step Down
Output Voltage (V)	3.3\|5
Maximum Switching Frequency (kHz)	250
Minimum Input Voltage (V)	3.5
Maximum Input Voltage (V)	20
Operating Supply Voltage (V)	3.5 to 20
Maximum Supply Current (mA)	2.1
Synchronous Rectifier	Yes
Synchronous Clock	No
Programmability	Yes
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Supplier Temperature Grade	Extended Commercial
Packaging	Tube
Pin Count	28
Standard Package Name	SOP
Supplier Package	SSOP
Mounting	Surface Mount
Package Height	2(Max) - 0.05(Min)
Package Length	10.5(Max)
Package Width	5.6(Max)
PCB changed	28
Lead Shape	Gull-wing

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LTC1142/LTC1142L/LTC1142HV

Dual High Efficiency

Synchronous Step-Down

Switching Regulators

FEATURES

DESCRIPTIO

Dual Outputs: 3.3V and 5V or User Programmable

Ultrahigh Efficiency: Over 95% Possible

Current Mode Operation for Excellent Line and Load

Transient Response

High Efficiency Maintained over 3 Decades of

Output Current

Low Standby Current at Light Loads: 160µA/Output

Independent Micropower Shutdown: I

< 40µA

Wide V

Range: 3.5V to 20V

Very Low Dropout Operation: 100% Duty Cycle

Synchronous FET Switching for High Efficiency

Available in Standard 28-Pin SSOP

The LTC

1142/LTC1142L/LTC1142HV are dual synchro-

nous step-down switching regulator controllers featuring

automatic Burst Mode

operation to maintain high efficien-

cies at low output currents. The devices are composed of two

separate regulator blocks, each driving a pair of external

complementary power MOSFETs, at switching frequencies

up to 250kHz, using a constant off-time current mode archi-

tecture providing constant ripple current in the inductor.

The operating current level for both regulators is user pro-

grammable via an external current sense resistor. Wide input

supply range allows operation from 3.5V* to 18V (20V

maximum). Constant off-time architecture provides low drop-

out regulation limited only by the R

DS(ON)

of the external

MOSFET and resistance of the inductor and current sense

resistor.

The LTC1142 series is ideal for applications requiring dual

output voltages with high conversion efficiencies over a wide

load current range in a small amount of board space.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a trademark of Linear Technology Corporation.

APPLICATIO S

Notebook and Palmtop Computers

Battery-Operated Digital Devices

Portable Instruments

DC Power Distribution Systems

TYPICAL APPLICATIO

IN3

22µF

25V

5.2V TO 18V

0.22µF

P-CH

Si9430DY

IN3

PDRIVE 3

SHDN3

0V = NORMAL

>1.5V = SHDN

SHDN5

IN5

PDRIVE 5

0.22µF

P-CH

Si9430DY

50µH

OUT3

3.3V/2A

SENSE3

0.05Ω

50µH

1000pF

MBRS130L

N-CH

Si9410DY

SENSE

–

NDRIVE 3

PGND3 SGND3 C

LTC1142HV

SENSE

–

NDRIVE 5

1000pF

N-CH

Si9410DY

MBRS130L

OUT3

220µF

10V

TH3

TH5

SGND5 PGND5

SENSE3,

SENSE5

: DALE WSL-2010-.05

L1, L2: COILTRONICS CTX50-2-MP

PINS 5, 7, 8, 19, 21, 22: NC

560pF 3300pF 3300pF 390pF

1142 F01

NOTE: COMPONENTS OPTIMIZED FOR HIGHEST EFFICIENCY, NOT MINIMUM BOARD SPACE.

Figure 1. High Efficiency Dual 3.3V, 5V Supply

IN5

22µF

25V

SENSE5

0.05Ω

OUT5

5V/2A

OUT5

220µF

10V

LTC1142HVCG#PBF Related Products

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Description	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP T/R	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP T/R	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP T/R	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP Tube	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP T/R	DC/DC Cntrlr Dual-OUT Step Down 250kHz 28-Pin SSOP
EU restricts the use of certain hazardous substances	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Not Compliant	Compliant	Compliant	Not Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Active	Active	Active	Active	Active	Active	Unconfirmed	Active	Active	Unconfirmed
Number of Outputs	2	2	2	2	2	2	2	2	2	2
Topology	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down
Output Voltage (V)	3.3\|5	3.3\|5	5\|3.3	3.3\|5	3.3\|5	3.3\|5	5\|3.3	5\|3.3	5\|3.3	3.3\|5
Maximum Switching Frequency (kHz)	250	250	250	250	250	250	250	250	250	250
Minimum Input Voltage (V)	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Maximum Input Voltage (V)	20	20	20	20	20	20	20	20	20	20
Operating Supply Voltage (V)	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20	3.5 to 20
Maximum Supply Current (mA)	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1	2.1
Synchronous Rectifier	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Synchronous Clock	No	No	No	No	No	No	No	No	No	No
Programmability	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Maximum Operating Temperature (°C)	70	70	70	70	70	70	70	70	70	70
Supplier Temperature Grade	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial	Extended Commercial
Pin Count	28	28	28	28	28	28	28	28	28	28
Standard Package Name	SOP	SOP	SOP	SOP	SOP	SOP	SOP	SOP	SOP	SOP
Supplier Package	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)
Package Length	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)	10.5(Max)
Package Width	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)
PCB changed	28	28	28	28	28	28	28	28	28	28
Lead Shape	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing
HTS	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	-	8542.39.00.01	8542.39.00.01	-

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