Datasheet Linear Technology LTC7138

Manufacturer	Linear Technology
Series	LTC7138

High Efficiency, 140V 400mA Step-Down Regulator

Datasheets

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PDF, 484 Kb, Language: en, File uploaded: Jul 31, 2016, Pages: 24
High Efficiency, 140V 400mA Step-Down Regulator

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Prices

Packaging

	LTC7138EMSE#PBF	LTC7138EMSE#TRPBF	LTC7138HMSE#PBF	LTC7138HMSE#TRPBF	LTC7138IMSE#PBF	LTC7138IMSE#TRPBF	LTC7138MPMSE#PBF	LTC7138MPMSE#TRPBF
N	1	2	3	4	5	6	7	8
Package	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing	MS-16E Package Outline Drawing
Package Code	MSE	MSE	MSE	MSE	MSE	MSE	MSE	MSE
Package Index	05-08-1871	05-08-1871	05-08-1871	05-08-1871	05-08-1871	05-08-1871	05-08-1871	05-08-1871
Pin Count	16	16	16	16	16	16	16	16

Parametrics

Parameters / Models	LTC7138EMSE#PBF	LTC7138EMSE#TRPBF	LTC7138HMSE#PBF	LTC7138HMSE#TRPBF	LTC7138IMSE#PBF	LTC7138IMSE#TRPBF	LTC7138MPMSE#PBF	LTC7138MPMSE#TRPBF
Architecture	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control	Hysteretic Mode Control
Demo Boards	DC2172A	DC2172A	DC2172A	DC2172A	DC2172A	DC2172A	DC2172A	DC2172A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no	no	no	no
Features	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output	Burst Mode, Programmable Output Current Limit, 100% Duty Cycle, Fixed Output
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.4
Isupply, mA	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012
Max Phases	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-55 to 125	-55 to 125
Output Current, A	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
Polyphase	no	no	no	no	no	no	no	no
Switch Current, A	0.610	0.610	0.610	0.610	0.610	0.610	0.610	0.610
Synchronous	no	no	no	no	no	no	no	no
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Topology 1	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	140	140	140	140	140	140	140	140
Vin Min, V	4	4	4	4	4	4	4	4
Vout Max, V	140	140	140	140	140	140	140	140
Vout Maximum	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin
Vout Min, V	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8
Vref Accuracy Over Temp, %	1	1	1	1	1	1	1	1

Eco Plan

	LTC7138EMSE#PBF	LTC7138EMSE#TRPBF	LTC7138HMSE#PBF	LTC7138HMSE#TRPBF	LTC7138IMSE#PBF	LTC7138IMSE#TRPBF	LTC7138MPMSE#PBF	LTC7138MPMSE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Robust 140V VIN, 400mA Step-Down Regulator for Industrial, Telecom and Automotive Environments &mdash DN543
PDF, 173 Kb, File published: Aug 19, 2015
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Robust 140V VIN, 400mA Step-Down Regulator for Industrial,
Telecom and Automotive Environments
Design Note 543
Mike Shriver
The LTC В®7138 is a 400mA step-down regulator that
can operate over an input voltage range of 4V to 140V,
ideal for industrial, telecom, automotive and other
applications subject to harsh line transients. Due to
the regulatorвЂ™s hysteretic architecture, no external
compensation is required. The output voltage is pinprogrammable to 1.8V, 3.3V or 5.0V, or if an external
divider is used, the output can be adjusted from 0.8V
to VIN. 100% duty cycle operation is possible because
of the internal P-channel FET. The LTC7138 is offered
in a thermally enhanced high voltage (skipped pins)
MSOP package.
Simple 5V/400mA Buck with Wide VIN Range
Figure 1 shows a 5V buck converter with a maximum
input voltage of 140V using only four external
components. Its output is set to 5V by tying the VPRG1
pin to the SS pin and the VPRG2 pin to ground. It does
not require any external compensation.
Efficiency remains high over a broad range of loads
due in part to the LTC7138вЂ™s Burst ModeВ® operation …

Model Line

Series: LTC7138 (8)

LTC7138EMSE#PBF LTC7138EMSE#TRPBF LTC7138HMSE#PBF LTC7138HMSE#TRPBF LTC7138IMSE#PBF LTC7138IMSE#TRPBF LTC7138MPMSE#PBF LTC7138MPMSE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | Internal Power Switch Buck | High Input Voltage Buck
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators