Datasheet Linear Technology LTC3770 — Datenblatt

Hersteller	Linear Technology
Serie	LTC3770

Fast No RSENSE Step-Down-Synchronregler mit Margining, Tracking und PLL

Datenblätter

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PDF, 273 Kb, Sprache: en, Datei hochgeladen: Sep 23, 2017, Seiten: 24
Fast No RSENSE Step-Down Synchronous Controller with Margining, Tracking and PLL

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Preise

Verpackung

	LTC3770EG#PBF	LTC3770EG#TRPBF	LTC3770EUH#PBF	LTC3770EUH#TRPBF
N	1	2	3	4
Package	SSOP-28 Paketumrisszeichnung	SSOP-28 Paketumrisszeichnung	5x5 QFN-32 Paketumrisszeichnung	5x5 QFN-32 Paketumrisszeichnung
Package Code	G	G	UH	UH
Package Index	05-08-1640 (G28)	05-08-1640 (G28)	05-08-1693	05-08-1693
Pin Count	28	28	32	32

Parameter

Parameters / Models	LTC3770EG#PBF	LTC3770EG#TRPBF	LTC3770EUH#PBF	LTC3770EUH#TRPBF
Architecture	Constant On-Time Valley Current Mode	Constant On-Time Valley Current Mode	Constant On-Time Valley Current Mode	Constant On-Time Valley Current Mode
Demo Boards	DC774A	DC774A	DC774A	DC774A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no
Features	No Rsense, Margining, Tracking, External Synchronization, PLL, Power Good	No Rsense, Margining, Tracking, External Synchronization, PLL, Power Good	No Rsense, Margining, Tracking, External Synchronization, PLL, Power Good	No Rsense, Margining, Tracking, External Synchronization, PLL, Power Good
Frequency Sync Range	Up to 1MHz	Up to 1MHz	Up to 1MHz	Up to 1MHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	30	30	30	30
Isupply, mA	1.3	1.3	1.3	1.3
Max Phases	1	1	1	1
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85
Output Current, A	15	15	15	15
Polyphase	no	no	no	no
Sense Resistor	None	None	None	None
Switch Current, A	15	15	15	15
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	32	32	32	32
Vin Min, V	4	4	4	4
Vout Max, V	28.8	28.8	28.8	28.8
Vout Maximum	0.9Vin	0.9Vin	0.9Vin	0.9Vin
Vout Min, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	0.67	0.67	0.67	0.67

Öko-Plan

	LTC3770EG#PBF	LTC3770EG#TRPBF	LTC3770EUH#PBF	LTC3770EUH#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Konstruktionshinweise

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High Accuracy Synchronous Step-Down Controller Provides Output Tracking and Programmable Margining &mdash DN364
PDF, 97 Kb, Datei veröffentlicht: Apr 11, 2005
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advertisement High Accuracy Synchronous Step-Down Controller Provides
Output Tracking and Programmable Margining вЂ“ Design Note 364
Charlie Zhao
Introduction
Output voltage tracking and margining are two increasingly popular features in power supply designs for
high performance server, ASIC and memory systems.
These two functions are among the advanced features
provided in the LTC В®3770, a wide operating range, high
accuracy, synchronous step-down DC/DC controller.
The LTC3770 operates with input voltages from 4V
to 32V, generating output voltages down to 0.6V with
its highly accurate В±0.67% 0.6V reference voltage. It
has a constant on-time, valley current mode control
architecture, which allows the LTC3770 to operate at
very low duty cycles with fast transient response. The
current sensing resistor is optional: leave it out for high
efп¬Ѓciency, or in for most accurate current limit. PGOOD RUN RPG
100k VOUT INTVCC
R1
39k R4
30.1k
1% 1 3
4 …

Modellreihe

Serie: LTC3770 (4)

LTC3770EG#PBF LTC3770EG#TRPBF LTC3770EUH#PBF LTC3770EUH#TRPBF

Herstellerklassifikation

Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers