DC799A datasheet, PDF - EEWORLD Datasheet

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DC799A: Descriptionboard eval for ltc3442ede; CategoryDevelopment board/suite/development tools; File Size130KB，5 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for ltc3442ede

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SYNCHRONOUS BUCK-BOOST CONVERTER WITH AUTOMATIC BURST MODE

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 799

LTC3442EDE

DESCRIPTION

Demonstration Circuit 799 is a high efficiency syn-

chronous Buck-Boost converter using the LTC3442.

The input range is from 2.4V to 5.5V, making it ideal

for single-cell Lithium-Ion or three-cell NiCd/NiMH

battery applications. This converter provides up to

95% efficiency, much higher than traditional Buck-

Boost converters. For 2.7V minimum input voltage,

this converter can provide up to 1.2A load current.

The output voltage is set at 3.3V. A different output

voltage in the range of 2.4V to 5.25V can be obtained

by changing one of the feedback resistors. The

switching frequency is set at 1MHz, which is a good

trade-off between efficiency and size. Adjusting RT

can program the frequency between 300kHz to 2MHz.

In shutdown, the IC itself draws less than 1µA.

Table 1. Performance Summary (T

= 25°C unless otherwise noted)

PARAMETER

Minimum Input Voltage

Maximum Input Voltage

Output Voltage V

OUT

Maximum Output Current

Typical Output Ripple V

OUT

Typical Switching Frequency

Efficiency (Fixed Frequency Mode)

CONDITION

-40°C to 85°C

= 2.5V to 5.5V, I

OUT

= 0A to 1.1A

= 2.5V

= 2.7V

= 3.6V, I

OUT

= 1.1A (20MHz BW)

RT=43.2K

= 4.2V, I

OUT

= 0.2A

= 4.2V, I

OUT

= 1.0A

Off (40°C to 85°C)

On (-40°C to 85°C)

VALUE

2.4V

5.5V

3.3V ±4%

1.1A

1.2A

45mV

1MHz

93% Typical

90% Typical

0.4V MAX

1.4V MIN

The LTC3442 has manual or programmable Auto-

matic Burst Mode operation and programmable aver-

age input current limit.

When using long wire connections to the input

source (such as wall adaptors), there can be input

over voltage transients during initial plug-in. C2 is

installed on DC799 to damp the possible voltage

transients. C2 is not needed for any application when

the input source is close to the regulator. Please refer

to Application Note 88 for details.

Design files for this circuit board are available. Call

the LTC factory.

LTC is a trademark of Linear Technology Corporation

On/Off Control

QUICK START PROCEDURE

Demonstration circuit 799 is easy to set up to evalu-

ate the performance of the LTC3442. Refer to Figure 1

for proper measurement equipment setup and follow

the procedure below:

DC799A Related Products

	DC799A	LTC3442EDE#TRPBF	LTC3442EDE#PBF
Description	board eval for ltc3442ede	IC REG BUCK BOOST ADJ 1.2A 12DFN	Output current: 1.2A Switch operating frequency: 300kHz ~ 2MHz Output type: Adjustable Number of output voltage channels: 1 Function type: Step-Up/Step-Down Output configuration: Positive Micropower synchronous buck with automatic burst mode operation -Boost DC/DC converter
Brand Name	-	Linear Technology	Linear Technology
Is it Rohs certified?	-	conform to	conform to
Maker	-	Linear ( ADI )	Linear ( ADI )
Parts packaging code	-	DFN	DFN
package instruction	-	HVSSON, SOLCC12,.12,20	HVSSON, SOLCC12,.12,20
Contacts	-	12	12
Manufacturer packaging code	-	DE/UE	DE/UE
Reach Compliance Code	-	compliant	compliant
ECCN code	-	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	-	VOLTAGE-MODE	VOLTAGE-MODE
Control Technology	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	-	5.5 V	5.5 V
Minimum input voltage	-	2.4 V	2.4 V
Nominal input voltage	-	3.6 V	3.6 V
JESD-30 code	-	R-PDSO-N12	R-PDSO-N12
JESD-609 code	-	e3	e3
length	-	4 mm	4 mm
Humidity sensitivity level	-	1	1
Number of functions	-	1	1
Number of terminals	-	12	12
Maximum operating temperature	-	85 °C	85 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	HVSSON	HVSSON
Encapsulate equivalent code	-	SOLCC12,.12,20	SOLCC12,.12,20
Package shape	-	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	260
Certification status	-	Not Qualified	Not Qualified
Maximum seat height	-	0.8 mm	0.8 mm
surface mount	-	YES	YES
Switch configuration	-	BUCK-BOOST	BUCK-BOOST
Maximum switching frequency	-	2000 kHz	2000 kHz
technology	-	CMOS	CMOS
Temperature level	-	OTHER	OTHER
Terminal surface	-	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	NO LEAD	NO LEAD
Terminal pitch	-	0.5 mm	0.5 mm
Terminal location	-	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	30
width	-	3 mm	3 mm

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