Datasheet Linear Technology LT1956

Manufacturer	Linear Technology
Series	LT1956

High Voltage, 1.5A, 500kHz Step-Down Switching Regulators

Datasheets

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PDF, 316 Kb, Language: en, File uploaded: Sep 3, 2017, Pages: 28
High Voltage, 1.5A, 500kHz Step-Down Switching Regulators

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Prices

Packaging

	LT1956EFE#PBF	LT1956EFE#TRPBF	LT1956EFE-5#PBF	LT1956EFE-5#TRPBF	LT1956EGN#PBF	LT1956EGN#TRPBF	LT1956EGN-5#PBF	LT1956EGN-5#TRPBF	LT1956IFE#PBF	LT1956IFE#TRPBF	LT1956IFE-5#PBF	LT1956IFE-5#TRPBF	LT1956IGN#PBF	LT1956IGN#TRPBF	LT1956IGN-5#PBF	LT1956IGN-5#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Package	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing
Package Code	FE	FE	FE	FE	GN	GN	GN	GN	FE	FE	FE	FE	GN	GN	GN	GN
Package Index	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1663 (BB)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)
Pin Count	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16

Parametrics

Parameters / Models	LT1956EFE#PBF	LT1956EFE#TRPBF	LT1956EFE-5#PBF	LT1956EFE-5#TRPBF	LT1956EGN#PBF	LT1956EGN#TRPBF	LT1956EGN-5#PBF	LT1956EGN-5#TRPBF	LT1956IFE#PBF	LT1956IFE#TRPBF	LT1956IFE-5#PBF	LT1956IFE-5#TRPBF	LT1956IGN#PBF	LT1956IGN#TRPBF	LT1956IGN-5#PBF	LT1956IGN-5#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B	DC423B
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Features	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization	Fixed Output, External Synchronization
Frequency, kHz	500	500	500	500	500	500	500	500	500	500	500	500	500	500	500	500
Frequency Sync Range	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz	580kHz - 700kHz
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25
Isupply, mA	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Max Phases	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Synchronous	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Topology	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting	Buck, Inverting
Vin Max, V	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60	60
Vin Min, V	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Vout Max, V	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45	45
Vout Maximum	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN	.75VIN
Vout Min, V	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Vref Accuracy Over Temp, %	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Vswitch Max, V	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35

Eco Plan

	LT1956EFE#PBF	LT1956EFE#TRPBF	LT1956EFE-5#PBF	LT1956EFE-5#TRPBF	LT1956EGN#PBF	LT1956EGN#TRPBF	LT1956EGN-5#PBF	LT1956EGN-5#TRPBF	LT1956IFE#PBF	LT1956IFE#TRPBF	LT1956IFE-5#PBF	LT1956IFE-5#TRPBF	LT1956IGN#PBF	LT1956IGN#TRPBF	LT1956IGN-5#PBF	LT1956IGN-5#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Efficient Dual Polarity Output Converter Fits into Tight Spaces &mdash DN318
PDF, 82 Kb, File published: Aug 2, 2003
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advertisement Efficient Dual Polarity Output Converter Fits into Tight Spaces
Design Note 318
Keith Szolusha
Introduction
This Design Note describes a compact and efп¬Ѓcient В±5V
output dual polarity converter that uses a single buck
regulator. The topology shown features 3mm maximum
circuit height, high efп¬Ѓciency and low output voltage
ripple on a 5V outputвЂ”important considerations for
many battery-powered, handheld and noise-sensitive
devices. This combination of features is not easily
achievable with other commonly used dual polarity
topologies. For instance, one alternative topology, a
п¬‚yback converter using a boost regulator, is relatively
inefп¬Ѓcient, requires a bulky (5mm or taller) transformer
and generates high output voltage ripple. Another alternative, using two buck regulators, incurs both the
cost of the additional regulator and the cost of the PCB
real estate it occupies.
The single buck regulator topology shown here requires
few components. To reduce the maximum circuit height,
it uses two power inductors instead of a transformer.
In the absence of the transformer core, the coupling
capacitor allows energy to pass between the positive …

Articles

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60V/3A Step-Down DC/DC Converter Maintains High Efficiency over a Wide Range of Input Voltages &mdash LT Journal
PDF, 179 Kb, File published: Aug 9, 2004
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DESIGN FEATURES 60V/3A Step-Down DC/DC Converter
Maintains High Efficiency over a Wide
by Mark W. Marosek
Range of Input Voltages
Introduction
sients as high as 60V). It is designed
to maintain excellent efficiencies at
both high and low input-to-output
voltage differentials over a wide input
voltage range. Its current mode architecture adds flexible frequency
compensation with no restriction on
the use of a ceramic output capacitorвЂ”resulting in small solutions with
extremely low output ripple voltage.
The LT3430 is pin compatible with
the LT1766 (60V, 1.5A, 200kHz) and
LT1956 (60V transient, 1.5A, 500kHz)
step down DC/DC converters.1 The LT3430 is a monolithic step-down
DC/DC converter that features a 3A
peak switch current limit and the
ability to operate with up to 60V input. The LT3430 runs at a fixed
frequency of 200kHz and is packaged
in a small thermally enhanced 16-pin
TSSOP package to save space and …

Model Line

Series: LT1956 (16)

LT1956EFE#PBF LT1956EFE#TRPBF LT1956EFE-5#PBF LT1956EFE-5#TRPBF LT1956EGN#PBF LT1956EGN#TRPBF LT1956EGN-5#PBF LT1956EGN-5#TRPBF LT1956IFE#PBF LT1956IFE#TRPBF LT1956IFE-5#PBF LT1956IFE-5#TRPBF LT1956IGN#PBF LT1956IGN#TRPBF LT1956IGN-5#PBF LT1956IGN-5#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck | High Input Voltage Buck