DC094A datasheet, PDF - EEWORLD Datasheet

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DC094A: Descriptionboard eval for ltc1435; CategoryDevelopment board/suite/development tools; File Size212KB，8 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board eval for ltc1435

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DEMO MANUAL DC094

DESIGN READY SWITCHER

LTC1435 Constant Frequency

Synchronous DC/DC Converter

This results in a power supply that has very high

efficiency, low ripple and fast transient response. At

low output currents the LTC1435 automatically switches

to Burst Mode

operation to reduce switching losses

and maintain high operating efficiencies. Additionally,

the supply current can be shut down to less than

20µA with an input voltage of 10V. This feature is an

absolute necessity to maximize battery life in portable

applications.

Gerber files for this circuit board are avail-

able. Call the LTC factory.

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

Burst Mode is a trademark of Linear Technology Corporation.

DESCRIPTIO

Demonstration Circuit 094 is a constant frequency step-

down (buck) regulator implemented entirely in surface

mount using the LTC

1435 switching regulator controller.

The output voltage is programmable from 1.8V to 5V via

a jumper. The input voltage can range from 4.5V to 28V

(limited by the external MOSFETs). The circuit highlights

the capabilities of the LTC1435 which uses a current

mode, constant frequency architecture to switch a pair of

N-channel power MOSFETs while providing 99% maxi-

mum duty cycle. Operating efficiencies exceeding 90%

are obtained.

PERFOR A CE SU

Input Voltage Range

Output

Maximum Input Voltage (Limited by External MOSFET and Input Capacitor)

Output Voltage (Jumper Selectable)

Maximum Output Current (Continuous)

Maximum Output Current (Peak)

Typical Output Ripple at 10MHz Bandwidth (Burst Mode Operation) I

= 100mA

Typical Output Ripple at 10MHz Bandwidth (Continuous) I

= 1A

OUT

EXTVCC

RUN

Frequency

Line Regulation, 6V to 20V

Load Regulation, No Load to Full Rated Output

Supply Current with No Load at 10V Input (Typical), SFB = INT V

, EXT V

= 5V

Supply Current in Shutdown (Typical), V

= 10V

EXT V

Pin Current, V

EXTVCC

= 5V, V

= 10V, No Load

Run Pin Threshold (Typical)

Operating Frequency (Typical), C

OSC

= 68pF

TYPICAL PERFOR A CE CHARACTERISTICS A D BOARD PHOTO

Efficiency

100

= 10V

SFB = INT V

OUT

= 5V

EFFICIENCY (%)

OUT

= 3.3V

OUT

= 2.5V

1000

100

LOAD CURRENT (mA)

4000

DM094 BP

DM094 TPC01

U W

ARY

U W

Operating Temperature Range 0

C to 50

4.5V to 28V

1.8V, 2.5V, 2.9V, 3.3V, 5V

3.5A

50mV

P-P

35mV

P-P

0.002%/V

– 1%

50µA

15µA

650µA

1.3V

170kHz

DC094A Related Products

	DC094A	LTC1435IS#PBF	LTC1435IS#TRPBF	LTC1435CG#PBF	LTC1435CG#TRPBF	LTC1435CS#TRPBF	LTC1435IG#TRPBF	LTC1435CS#PBF	LTC1435IG#PBF
Description	board eval for ltc1435	IC REG CTRLR BUCK 16SOIC	IC REG CTRLR BUCK 16SOIC	IC REG CTRLR BUCK 16SSOP	IC REG CTRLR BUCK 16SSOP	IC REG CTRLR BUCK 16SOIC	IC REG CTRLR BUCK 16SSOP	IC REG CTRLR BUCK 16SOIC	IC REG CTRLR BUCK 16SSOP
Brand Name	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	-	conform to	conform to	conform to	conform to	conform to	conform to	conform to	conform to
Maker	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	-	SOIC	SOIC	SSOP	SSOP	SOIC	SSOP	SOIC	SSOP
package instruction	-	SOP, SOP16,.25	SOP, SOP16,.25	SSOP, SSOP16,.3	SSOP, SSOP16,.3	SOP, SOP16,.25	SSOP, SSOP16,.3	SOP, SOP16,.25	SSOP, SSOP16,.3
Contacts	-	16	16	16	16	16	16	16	16
Manufacturer packaging code	-	S	S	G	G	S	G	S	G
Reach Compliance Code	-	compliant	compliant	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	-	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Control Technology	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	-	30 V	30 V	30 V	36 V	36 V	30 V	30 V	30 V
Minimum input voltage	-	3.5 V	3.5 V	3.5 V	3.5 V	3.5 V	3.5 V	3.5 V	3.5 V
Nominal input voltage	-	15 V	15 V	15 V	15 V	15 V	15 V	15 V	15 V
JESD-30 code	-	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16
JESD-609 code	-	e3	e3	e3	e3	e3	e3	e3	e3
length	-	9.9 mm	9.9 mm	6.7 mm	6.7 mm	9.906 mm	6.7 mm	9.9 mm	6.7 mm
Humidity sensitivity level	-	1	1	1	1	1	1	1	1
Number of functions	-	1	1	1	1	1	1	1	1
Number of terminals	-	16	16	16	16	16	16	16	16
Maximum operating temperature	-	85 °C	85 °C	70 °C	70 °C	70 °C	85 °C	70 °C	85 °C
Maximum output current	-	2 A	2 A	2 A	2 A	2 A	2 A	2 A	2 A
Nominal output voltage	-	1.19 V	5 V	1.19 V	1.19 V	1.19 V	1.19 V	1.19 V	1.19 V
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	SOP	SOP	SSOP	SSOP	SOP	SSOP	SOP	SSOP
Encapsulate equivalent code	-	SOP16,.25	SOP16,.25	SSOP16,.3	SSOP16,.3	SOP16,.25	SSOP16,.3	SOP16,.25	SSOP16,.3
Package shape	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	-	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	-	260	260	260	260	260	NOT SPECIFIED	260	260
Certification status	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	-	1.75 mm	1.752 mm	2 mm	1.99 mm	1.752 mm	2 mm	1.75 mm	2 mm
surface mount	-	YES	YES	YES	YES	YES	YES	YES	YES
Switch configuration	-	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL
Maximum switching frequency	-	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz
technology	-	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	-	INDUSTRIAL	INDUSTRIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL	COMMERCIAL	INDUSTRIAL
Terminal surface	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	-	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	-	1.27 mm	1.27 mm	0.65 mm	0.65 mm	1.27 mm	0.65 mm	1.27 mm	0.65 mm
Terminal location	-	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	-	30	30	30	30	30	NOT SPECIFIED	30	30
width	-	3.9 mm	3.9 mm	5.3 mm	5.29 mm	3.899 mm	5.3 mm	3.9 mm	5.3 mm
Base Number Matches	-	1	1	1	1	1	1	1	1

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