LTC1879EGN#TRPBF datasheet, PDF

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LTC1879EGN#TRPBF: DescriptionIC REG BUCK ADJ 1.2A SYNC 16SSOP; CategoryPower/power management The power supply circuit; File Size476KB，5 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC1879EGN#TRPBF Overview

IC REG BUCK ADJ 1.2A SYNC 16SSOP

LTC1879EGN#TRPBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	SSOP
package instruction	SSOP, SSOP16,.25
Contacts	16
Manufacturer packaging code	GN
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	10 V
Minimum input voltage	2.65 V
Nominal input voltage	5 V
JESD-30 code	R-PDSO-G16
JESD-609 code	e3
length	4.9 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Encapsulate equivalent code	SSOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	250
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	605 kHz
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.635 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3.9116 mm

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 432

HIGH EFFICIENCY SYNCHRONOUS STEP-DOWN REGULATOR

LTC1875 or LTC1879

DESCRIPTION

Demonstration circuit 432 is a step-down converter, fea-

turing either the LTC1875 or LTC1879 high frequency

monolithic switching regulators. With an input voltage

range from 2.65V to 6V, the LTC1875 is ideal for Li-Ion

applications, such as PDAs, cellular phones, and digital

cameras. For applications with higher input voltages, the

LTC1879 is the choice with its maximum input voltage

limit of 10V. Both devices have switch current limits over

1A (LTC1875-1.6A, LTC1879-1.8A), which allows these

Table 1. Performance Summary

PARAMETER

Minimum Input Voltage

Maximum Input Voltage

(

LTC1875)

Maximum Input Voltage (LTC1879)

OUT (

LTC1875)

OUT

(LTC1879)

OUT (

LTC1875)

OUT

(LTC1879)

Nominal Switching Frequency

OUT

= 0A to 1.5A

OUT

= 0A to 1.2A

CONDITION

VALUE

2.65V

10V

0.8V ±2% to V

±2%

0.8V ±2% to V

±2%

1.5A

1.2A

550kHz

ICs to deliver high(er) power to small, low-profile appli-

cations. While the standard operating frequency of both

parts is 550 kHz, the switching can be externally set as

high as 750 kHz. All these features make the LTC1879

(DC432A) or LTC1875 (DC432B) perfectly suited for bat-

tery-powered, surface mount applications.

Design files for this circuit board are available. Call

the LTC factory.

QUICK START PROCEDURE

Demonstration circuit 432 is easy to set up to evaluate

the performance of the LTC1875 or LTC1879. Refer to

Figure 1 for proper measurement equipment setup and

follow the procedure below:

When measuring the input or output voltage ripple, care

must be taken to avoid a long ground lead on the oscil-

loscope probe. Measure the input or output voltage rip-

ple by touching the probe tip directly across the Vin or

Vout and GND terminals. Refer to Figure 2 for proper

placement of the scope probe.

Place jumper JP2 in the SHDN position.

Select the desired output voltage, using jumper JP3.

Connect the load between the Vout and GND termi-

nals on the bottom right-side of the board.

With power off, connect the input power supply to Vin

and GND (which are at the bottom left-side of the

board). Turn on the power at the input.

NOTE:

If evaluating the LTC1875, do not exceed 6V in-

put; if evaluating the LTC1879, do not exceed 10V in.

Place jumper JP2 in the RUN position.

Check for the proper output voltages.

If there is no output, temporarily disconnect the load

to make sure that the load is not set too high.

Once the proper output voltages are established, ad-

The fixed output options are 1.8V, 2.5V, and 3.3V. Too

set the output voltage to a custom value, insert a re-

sistor into RFB5.

just the loads within the operating range and observe

the output voltage regulation, ripple voltage, efficiency

and other parameters.

LTC1879EGN#TRPBF Related Products

	LTC1879EGN#TRPBF	LTC1879EGN#TR	DC432A	LTC1879EGN#PBF
Description	IC REG BUCK ADJ 1.2A SYNC 16SSOP	IC reg buck sync adj 1.2A 16ssop	board eval for ltc1879egn	Output current: 1.2A Switch operating frequency: 550kHz Output type: Adjustable Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive
Brand Name	Linear Technology	Linear Technology	-	Linear Technology
Is it Rohs certified?	conform to	incompatible	-	conform to
Maker	Linear ( ADI )	Linear ( ADI )	-	Linear ( ADI )
Parts packaging code	SSOP	SSOP	-	SSOP
package instruction	SSOP, SSOP16,.25	SSOP, SSOP16,.25	-	SSOP, SSOP16,.25
Contacts	16	16	-	16
Manufacturer packaging code	GN	GN	-	GN
Reach Compliance Code	compliant	compli	-	compliant
ECCN code	EAR99	EAR99	-	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	-	SWITCHING REGULATOR
control mode	CURRENT-MODE	CURRENT-MODE	-	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION
Maximum input voltage	10 V	10 V	-	10 V
Minimum input voltage	2.65 V	2.65 V	-	2.65 V
Nominal input voltage	5 V	5 V	-	5 V
JESD-30 code	R-PDSO-G16	R-PDSO-G16	-	R-PDSO-G16
JESD-609 code	e3	e0	-	e3
length	4.9 mm	4.9 mm	-	4.9 mm
Humidity sensitivity level	1	1	-	1
Number of functions	1	1	-	1
Number of terminals	16	16	-	16
Maximum operating temperature	85 °C	85 °C	-	85 °C
Minimum operating temperature	-40 °C	-40 °C	-	-40 °C
Maximum output current	3 A	3 A	-	3 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY
encapsulated code	SSOP	SSOP	-	SSOP
Encapsulate equivalent code	SSOP16,.25	SSOP16,.25	-	SSOP16,.25
Package shape	RECTANGULAR	RECTANGULAR	-	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	-	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	250	235	-	260
Certification status	Not Qualified	Not Qualified	-	Not Qualified
Maximum seat height	1.75 mm	1.75 mm	-	1.75 mm
surface mount	YES	YES	-	YES
Switch configuration	BUCK	BUCK	-	BUCK
Maximum switching frequency	605 kHz	605 kHz	-	605 kHz
technology	CMOS	CMOS	-	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	-	INDUSTRIAL
Terminal surface	Matte Tin (Sn)	Tin/Lead (Sn/Pb)	-	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	-	GULL WING
Terminal pitch	0.635 mm	0.635 mm	-	0.635 mm
Terminal location	DUAL	DUAL	-	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED	20	-	30
width	3.9116 mm	3.9116 mm	-	3.9116 mm

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