Datasheet Linear Technology LTC3809

Manufacturer	Linear Technology
Series	LTC3809

No Rsense, Low EMI, Synchronous DC/DC Controller

Datasheets

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PDF, 298 Kb, Language: en, File uploaded: Sep 23, 2017, Pages: 24
No RSENSE , Low EMI, Synchronous DC/DC Controller

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Packaging

	LTC3809EDD#PBF	LTC3809EDD#TRPBF	LTC3809EMSE#PBF	LTC3809EMSE#TRPBF
N	1	2	3	4
Package	3x3 DFN-10 Package Outline Drawing	3x3 DFN-10 Package Outline Drawing	MS-10E Package Outline Drawing	MS-10E Package Outline Drawing
Package Code	DD	DD	MSE	MSE
Package Index	05-08-1699	05-08-1699	05-08-1664	05-08-1664
Pin Count	10	10	10	10

Parametrics

Parameters / Models	LTC3809EDD#PBF	LTC3809EDD#TRPBF	LTC3809EMSE#PBF	LTC3809EMSE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	No Rsense, Spread Spectrum, External Synchronization, PLL, Selectable Switching Frequency, Burst Mode, Power Good, 100% Duty Cycle	No Rsense, Spread Spectrum, External Synchronization, PLL, Selectable Switching Frequency, Burst Mode, Power Good, 100% Duty Cycle	No Rsense, Spread Spectrum, External Synchronization, PLL, Selectable Switching Frequency, Burst Mode, Power Good, 100% Duty Cycle	No Rsense, Spread Spectrum, External Synchronization, PLL, Selectable Switching Frequency, Burst Mode, Power Good, 100% Duty Cycle
Frequency, kHz	750	750	750	750
Frequency Adjust Range	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz	300kHz, 550kHz, 750kHz
Frequency Sync Range	250kHz - 750kHz	250kHz - 750kHz	250kHz - 750kHz	250kHz - 750kHz
Integrated Inductor	no	no	no	no
Ishutdown, µA	9	9	9	9
Isupply, mA	0.35	0.35	0.35	0.35
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	5	5	5	5
Polyphase	no	no	no	no
Sense Resistor	None	None	None	None
Switch Current, A	5	5	5	5
Synchronous	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck
Vin Max, V	9.8	9.8	9.8	9.8
Vin Min, V	2.75	2.75	2.75	2.75
Vout Max, V	9.8	9.8	9.8	9.8
Vout Maximum	Vin	Vin	Vin	Vin
Vout Min, V	0.6	0.6	0.6	0.6
Vref Accuracy Over Temp, %	1.5	1.5	1.5	1.5

Eco Plan

	LTC3809EDD#PBF	LTC3809EDD#TRPBF	LTC3809EMSE#PBF	LTC3809EMSE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking &mdash DN382
PDF, 122 Kb, File published: Dec 9, 2005
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advertisement Low EMI Synchronous DC/DC Step-Down Controllers Offer
Programmable Output Tracking вЂ“ Design Note 382
Charlie Zhao
Introduction
The LTCВ® 3808 synchronous DC/DC step-down controller
packs numerous features required by the latest electronic
devices into a low proп¬Ѓle (0.75mm) 3mm Г— 4mm leadless
DFN package or a leaded SSOP-16 package. Two similar
parts, the LTC3809 and LTC3809-1, are even smaller, but
less feature-rich versions of the LTC3808. The LTC3809
family is available in a 3mm Г— 3mm leadless DFN package
or a 10-pin MSOP Exposed Pad package. All three parts
can provide output voltages as low as 0.6V and output
currents as high as 7A from a 2.75V to 9.8V input range,
making them ideal devices for one or two lithium-ion cell
inputs as well as distributed DC power systems.
The LTC3808 and LTC3809 also include important
features for noise-sensitive applications, including a
phase-locked loop (PLL) for frequency synchronization
and spread spectrum frequency modulation to minimize
generated electromagnetic interference (EMI). The
adjustable operating frequency (300kHz to 750kHz) allows
the use of small surface mount inductors and ceramic …

Model Line

Series: LTC3809 (4)

LTC3809EDD#PBF LTC3809EDD#TRPBF LTC3809EMSE#PBF LTC3809EMSE#TRPBF

Manufacturer's Classification

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