Datasheet Linear Technology LTC1265

Manufacturer	Linear Technology
Series	LTC1265

1.2A, High Efficiency Step-Down DC/DC Converter

Datasheets

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PDF, 244 Kb, Language: en, File uploaded: Sep 20, 2017, Pages: 16
1.2A, High Efficiency Step-Down DC/DC Converter

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Packaging

	LTC1265CS#PBF	LTC1265CS#TRPBF	LTC1265CS-3.3#PBF	LTC1265CS-3.3#TRPBF	LTC1265CS-5#PBF	LTC1265CS-5#TRPBF	LTC1265IS#PBF	LTC1265IS#TRPBF
N	1	2	3	4	5	6	7	8
Package	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing	SO-14 Package Outline Drawing
Package Code	S	S	S	S	S	S	S	S
Package Index	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)	05-08-1610 (S14)
Pin Count	14	14	14	14	14	14	14	14

Parametrics

Parameters / Models	LTC1265CS#PBF	LTC1265CS#TRPBF	LTC1265CS-3.3#PBF	LTC1265CS-3.3#TRPBF	LTC1265CS-5#PBF	LTC1265CS-5#TRPBF	LTC1265IS#PBF	LTC1265IS#TRPBF
Architecture	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode	Constant Off-Time Current Mode
Demo Boards	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C	DC074A-A,DC074A-B,DC074A-C
Design Tools	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
Features	Burst Mode	Burst Mode	Burst Mode	Burst Mode	Burst Mode	Burst Mode	Burst Mode	Burst Mode
Frequency, kHz	700	700	700	700	700	700	700	700
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	15	15	15	15	15	15	15	15
Isupply, mA	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
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 70	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85
Output Current, A	0.96	0.96	0.96	0.96	0.96	0.96	0.96	0.96
Polyphase	no	no	no	no	no	no	no	no
Switch Current, A	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Synchronous	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
Vin Max, V	13	13	13	13	13	13	13	13
Vin Min, V	4	4	4	4	4	4	4	4
Vout Max, V	13	13	13	13	13	13	13	13
Vout Maximum	Vin	Vin	Vin	Vin	Vin	Vin	Vin	Vin
Vout Min, V	1.25	1.25	1.25	1.25	1.25	1.25	1.25	1.25
Vref Accuracy Over Temp, %	4	4	4	4	4	4	4	4
Vswitch Max, V	13	13	13	13	13	13	13	13

Eco Plan

	LTC1265CS#PBF	LTC1265CS#TRPBF	LTC1265CS-3.3#PBF	LTC1265CS-3.3#TRPBF	LTC1265CS-5#PBF	LTC1265CS-5#TRPBF	LTC1265IS#PBF	LTC1265IS#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
LTC1265: A New, High Efficiency Monolithic Buck Converter &mdash DN105
PDF, 74 Kb, File published: Jun 1, 1995
Extract from the document
advertisement A New, High Efficiency Monolithic Buck Converter
Design Note 105
San-Hwa Chee
The LTC В®1265 is a 14-pin SOIC step-down converter
capable of operating at frequencies up to 700kHz. High
frequency operation permits the use of small inductors
for size sensitive applications. The LTC1265 has an
internal 0.3О© (at a supply voltage of 10V) P-channel
power MOSFET switch, which is capable of supplying
up to 1.2A of output current. With no load, the converter requires only 160ОјA of quiescent current; this
decreases to a mere 5ОјA in shutdown conditions. In
dropout mode, the internal P-channel power MOSFET
switch is turned on continuously (at DC), thereby maximizing battery life. The part is protected from output
shorts by its built-in current limiting. In addition to the
features already mentioned, the LTC1265 incorporates
a low-battery detector.
The LTC1265 is a current mode DC/DC converter with
Burst ModeВ® operation. The current mode architecture
gives the LTC1265 excellent load and line regulation.
Burst Mode operation results in high efп¬Ѓciency with
both high and low load currents. The LTC1265 comes
in three versions: LTC1265-5 (5V output), LTC1265-3.3
(3.3V output) and LTC1265 (adjustable). All versions …
Download
Highly Integrated High Efficiency DC/DC Conversion &mdash DN98
PDF, 77 Kb, File published: Mar 1, 1995
Extract from the document
advertisement Highly Integrated High Efficiency DC/DC Conversion
Design Note 98
San-Hwa Chee and Howard Haensel
The LTC В®1574 and LTC1265 high efп¬Ѓciency step-down
regulators minimize external components by using integrated low RDS(ON) P-channel switches. The LTC1574
goes one step further by including a low forward drop
Schottky diodeвЂ”an industry п¬Ѓrst. Both regulators also
include on-chip low-battery detectors.
Burst ModeВ® operation allows the LTC1574 and LTC1265
to achieve over 90% efп¬Ѓciency for load currents as
low as 10mA. Current mode operation provides clean
start-up, accurate current limit, and excellent line and
load regulation. Inherent 100% duty cycle in dropout
allows the user to extract maximum battery life. Both
regulators can be shut down to a few microamperes.
LTC1574
The LTC1574 features the highest level of integration
for a switching regulator. Besides an on-chip power
MOSFET, it includes a low forward drop Schottky diode.
The user needs only to provide an inductor and input/
output п¬Ѓlter capacitors for a complete high efп¬Ѓciency
step-down converter. The current limit is pin selectable
to either 340mA or 600mA, optimizing efп¬Ѓciency for a …

Model Line

Series: LTC1265 (8)

LTC1265CS#PBF LTC1265CS#TRPBF LTC1265CS-3.3#PBF LTC1265CS-3.3#TRPBF LTC1265CS-5#PBF LTC1265CS-5#TRPBF LTC1265IS#PBF LTC1265IS#TRPBF

Manufacturer's Classification

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