Datasheet Linear Technology LT3470

Manufacturer	Linear Technology
Series	LT3470

Micropower Buck Regulator with Integrated Boost and Catch Diodes

Datasheets

Preview and Download

PDF, 292 Kb, Language: en, File uploaded: Sep 18, 2017, Pages: 20
Micropower Buck Regulator with Integrated Boost and Catch Diodes

Extract from the document

Prices

Packaging

	LT3470EDDB#PBF	LT3470EDDB#TRMPBF	LT3470EDDB#TRPBF	LT3470ETS8#PBF	LT3470ETS8#TRMPBF	LT3470ETS8#TRPBF	LT3470HDDB#PBF	LT3470HDDB#TRMPBF	LT3470HDDB#TRPBF	LT3470HTS8#PBF	LT3470HTS8#TRMPBF	LT3470HTS8#TRPBF	LT3470IDDB#PBF	LT3470IDDB#TRMPBF	LT3470IDDB#TRPBF	LT3470ITS8#PBF	LT3470ITS8#TRMPBF	LT3470ITS8#TRPBF
N	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Package	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	3x2 DFN-8 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing	SOT-23 Package Outline Drawing
Package Code	DDB	DDB	DDB	TS8	TS8	TS8	DDB	DDB	DDB	TS8	TS8	TS8	DDB	DDB	DDB	TS8	TS8	TS8
Package Index	05-08-1702	05-08-1702	05-08-1702	05-08-1637	05-08-1637	05-08-1637	05-08-1702	05-08-1702	05-08-1702	05-08-1637	05-08-1637	05-08-1637	05-08-1702	05-08-1702	05-08-1702	05-08-1637	05-08-1637	05-08-1637
Pin Count	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8

Parametrics

Parameters / Models	LT3470EDDB#PBF	LT3470EDDB#TRMPBF	LT3470EDDB#TRPBF	LT3470ETS8#PBF	LT3470ETS8#TRMPBF	LT3470ETS8#TRPBF	LT3470HDDB#PBF	LT3470HDDB#TRMPBF	LT3470HDDB#TRPBF	LT3470HTS8#PBF	LT3470HTS8#TRMPBF	LT3470HTS8#TRPBF	LT3470IDDB#PBF	LT3470IDDB#TRMPBF	LT3470IDDB#TRPBF	LT3470ITS8#PBF	LT3470ITS8#TRMPBF	LT3470ITS8#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	Hysteretic Mode Control	Hysteretic Mode Control	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	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B	DC1037A,DC716B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	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	no	no	no	no	no	no	no	no	no	no
Features	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode	Burst Mode, Integrated Boost Diode
Frequency Adjust Range	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic	Hysteretic
Integrated Inductor	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Ishutdown, µA	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, mA	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025
Max Phases	1	1	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	yes	yes
Number of Outputs	1	1	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	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Polyphase	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Switch Current, A	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325	0.325
Synchronous	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no	no
Topology	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40
Vin Min, V	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Vout Max, V	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16
Vout Maximum	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V	16V
Vout Min, V	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25
Vref Accuracy Over Temp, %	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	1.2	1.2

Eco Plan

	LT3470EDDB#PBF	LT3470EDDB#TRMPBF	LT3470EDDB#TRPBF	LT3470ETS8#PBF	LT3470ETS8#TRMPBF	LT3470ETS8#TRPBF	LT3470HDDB#PBF	LT3470HDDB#TRMPBF	LT3470HDDB#TRPBF	LT3470HTS8#PBF	LT3470HTS8#TRMPBF	LT3470HTS8#TRPBF	LT3470IDDB#PBF	LT3470IDDB#TRMPBF	LT3470IDDB#TRPBF	LT3470ITS8#PBF	LT3470ITS8#TRMPBF	LT3470ITS8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
ThinSOT Micropower Buck Regulator Has Low Output Ripple &mdash DN373
PDF, 102 Kb, File published: Aug 10, 2005
Extract from the document
advertisement ThinSOT Micropower Buck Regulator Has Low Output Ripple
Design Note 373
Keith Szolusha
Introduction
High voltage monolithic step-down converters simplify
circuit design and save space by integrating the highside power switch into the device. In most cases, the
switch is an n-type transistor (NMOS or NPN) with a
boot-strapped drive stage, requiring an external boost
diode and capacitor as well as the main catch diode,
complicating the applications circuit. If the load is light, the IC alternates between micropower
and switching states to keep the output in regulation
(Figure 3a). Hysteretic mode allows the IC to provide
single switch-cycle bursts for the lowest possible lightload output voltage ripple ( …

Articles

Download
Low Ripple Micropower SOT-23 Buck Regulator with Integrated Boost and Catch Diodes Accepts Inputs to 40V &mdash LT Journal
PDF, 434 Kb, File published: Mar 28, 2006
Extract from the document
DESIGN IDEAS Low Ripple Micropower SOT-23 Buck
Regulator with Integrated Boost and
Catch Diodes Accepts Inputs to 40V
by Leonard Shtargot Introduction
The LT3470 is a micropower buck
regulator that integrates a 300mA
power switch, catch diode and boost
diode into a low proп¬Ѓle 8-Pin ThinSOT
package (see Figure 1). The combination of single cycle Burst Mode and
continuous operation allows the use
of tiny inductor and capacitors while
providing a low ripple output to loads
of up to 200mA. With its wide input
range of 4V to 40V and low quiescent
current of 26ВµA (12V in to 3.3V out) the
LT3470 can regulate a wide variety of
power sources, from 2-cell Li-Ion batteries to unregulated wall transformers
and lead acid batteries. 3 BIAS 7 +
вЂ“ BOOST 500ns
ONE SHOT
R QвЂІ S Q SW вЂ“
ENABLE 5V, 200mA from 40V
Consumes Less than …

Model Line

Series: LT3470 (18)

LT3470EDDB#PBF LT3470EDDB#TRMPBF LT3470EDDB#TRPBF LT3470ETS8#PBF LT3470ETS8#TRMPBF LT3470ETS8#TRPBF LT3470HDDB#PBF LT3470HDDB#TRMPBF LT3470HDDB#TRPBF LT3470HTS8#PBF LT3470HTS8#TRMPBF LT3470HTS8#TRPBF LT3470IDDB#PBF LT3470IDDB#TRMPBF LT3470IDDB#TRPBF LT3470ITS8#PBF LT3470ITS8#TRMPBF LT3470ITS8#TRPBF

Manufacturer's Classification

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