LT3800EFE#PBF datasheet, PDF - EEWORLD Datasheet

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LT3800EFE#PBF: DescriptionOutputable current: - Switching operating frequency: 200kHz Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive or Negative High voltage synchronous current mode buck controller; CategoryPower/power management The power supply circuit; File Size268KB，24 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LT3800EFE#PBF Overview

Outputable current: - Switching operating frequency: 200kHz Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive or Negative High voltage synchronous current mode buck controller

LT3800EFE#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	TSSOP
package instruction	HTSSOP, TSSOP16,.25
Contacts	16
Manufacturer packaging code	FE
Reach Compliance Code	compliant
ECCN code	EAR99
Samacsys Description	Linear Technology LT3800EFE#PBF, Step Down DC-DC Converter, 16-Pin TSSOP
Other features	OUTPUT VOLTAGES UP TO 36V
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Maximum input voltage	60 V
Minimum input voltage	4 V
Nominal input voltage	20 V
JESD-30 code	R-PDSO-G16
JESD-609 code	e3
length	5 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	16
Maximum operating temperature	125 °C
Minimum operating temperature
Nominal output voltage	8 V
Package body material	PLASTIC/EPOXY
encapsulated code	HTSSOP
Encapsulate equivalent code	TSSOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.1 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	220 kHz
Temperature level	OTHER
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm

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FEATURES

LT3800

High-Voltage Synchronous

Current Mode Step-Down

Controller

DESCRIPTION

The LT

3800 is a 200kHz ﬁxed frequency high voltage

synchronous current mode step-down switching regulator

controller. The IC drives standard gate N-channel power

MOSFETs and can operate with input voltages from 4V to

60V. An onboard regulator provides IC power directly from

and provides for output-derived power to minimize

quiescent current. MOSFET drivers employ an internal

dynamic bootstrap feature, maximizing gate-source “ON”

voltages during normal operation for improved operating

efﬁciencies. The LT3800 incorporates Burst Mode

opera-

tion, which reduces no load quiescent current to under

100μA. Light load efﬁciencies are also improved through

a reverse inductor current inhibit, allowing the controller

to support discontinuous operation. Both Burst Mode

operation and the reverse-current inhibit features can be

disabled if desired. The LT3800 incorporates a program-

mable soft-start that directly controls the voltage slew rate

of the converter output for reduced startup surge currents

and overshoot errors. The LT3800 is available in a 16-lead

thermally enhanced TSSOP package.

LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks

and No R

SENSE

and ThinSOT are trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners. Protected by U.S. Patents including

5481178, 6611131, 6304066, 6498466, 6580258.

Wide 4V to 60V Input Voltage Range

Output Voltages up to 36V

Adaptive Nonoverlap Circuitry Prevents Switch

Shoot-Through

Reverse Inductor Current Inhibit for Discontinuous

Operation Improves Efﬁciency with Light Loads

Output Slew Rate Controlled Soft-Start with

Auto-Reset

100μA No Load Quiescent Current

Low 10μA Current Shutdown

1% Regulation Accuracy

200kHz Operating Frequency

Standard Gate N-Channel Power MOSFETs

Current Limit Unaffected by Duty Cycle

Reverse Overcurrent Protection

16-Lead Thermally Enhanced TSSOP Package

APPLICATIONS

12V and 42V Automotive and Heavy Equipment

48V Telecom Power Supplies

Avionics and Industrial Control Systems

Distributed Power Converters

TYPICAL APPLICATION

12V 75W DC/DC Converter with Reverse Current Inhibit and Input UVLO

20V TO 55V

Efﬁciency and Power Loss

56μF

×2

82.5k

1.5nF

SHDN

200k

20k

174k

BURST_EN

100pF

82.5k

680pF

1μF

PGND

0.1

0.015Ω

LOAD

(A)

3800 TA01b

BOOST

1μF

LT3800

BAS19

1μF

×3

Si7850DP

EFFICIENCY (%)

100

= 24V

LOSS (48V)

B160

= 36V

= 60V

= 48V

POWER LOSS (W)

1N4148

Si7370DP

15μH

SENSE

–

SENSE

SGND

10μF

OUT

12V AT 75W

270μF

3800 TA01a

3800fc

LT3800EFE#PBF Related Products

	LT3800EFE#PBF	LT3800IFE#PBF	LT3800EFE#TRPBF	LT3800IFE#TRPBF
Description	Outputable current: - Switching operating frequency: 200kHz Output type: Transistor Driver Number of output voltage channels: 1 Function type: Step-Down Output configuration: Positive or Negative High voltage synchronous current mode buck controller	IC REG CTRLR BUCK 16TSSOP	IC REG CTRLR BUCK 16TSSOP	IC REG CTRLR BUCK 16TSSOP
Brand Name	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	conform to	conform to	conform to	conform to
Maker	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	TSSOP	TSSOP	TSSOP	TSSOP
package instruction	HTSSOP, TSSOP16,.25	HTSSOP, TSSOP16,.25	HTSSOP, TSSOP16,.25	HTSSOP, TSSOP16,.25
Contacts	16	16	16	16
Manufacturer packaging code	FE	FE	FE	FE
Reach Compliance Code	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99
Other features	OUTPUT VOLTAGES UP TO 36V	OUTPUT VOLTAGES UP TO 36V	OUTPUT VOLTAGES UP TO 36V	OUTPUT VOLTAGES UP TO 36V
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
control mode	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Maximum input voltage	60 V	60 V	60 V	60 V
Minimum input voltage	4 V	4 V	4 V	4 V
Nominal input voltage	20 V	20 V	20 V	20 V
JESD-30 code	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16
JESD-609 code	e3	e3	e3	e3
length	5 mm	5 mm	5 mm	5 mm
Humidity sensitivity level	1	1	1	1
Number of functions	1	1	1	1
Number of terminals	16	16	16	16
Maximum operating temperature	125 °C	125 °C	125 °C	125 °C
Nominal output voltage	8 V	8 V	8 V	8 V
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HTSSOP	HTSSOP	HTSSOP	HTSSOP
Encapsulate equivalent code	TSSOP16,.25	TSSOP16,.25	TSSOP16,.25	TSSOP16,.25
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260	260	260	260
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.1 mm	1.1 mm	1.1 mm	1.1 mm
surface mount	YES	YES	YES	YES
Switch configuration	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL
Maximum switching frequency	220 kHz	220 kHz	220 kHz	220 kHz
Temperature level	OTHER	AUTOMOTIVE	OTHER	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.65 mm	0.65 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	30	30	30
width	4.4 mm	4.4 mm	4.4 mm	4.4 mm

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