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LTC3405AES6#PBF

Description
Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R
File Size208KB，16 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3405AES6#PBF Overview

Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R

LTC3405AES6#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)0
Part StatusUnconfirmed
HTS8542.39.00.01
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)210(Typ)
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)0.8 to 6
Maximum Output Current (A)0.3
Minimum Input Voltage (V)2.5
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.5 to 6
Line Regulation0.4%/V
Load Regulation0.5%(Typ)
Efficiency (%)96
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTape and Reel
Pin Count6
Standard Package NameSOT
Supplier PackageTSOT-23
MountingSurface Mount
Package Height0.9(Max)
Package Length2.9
Package Width1.75(Max)
PCB changed6
Lead ShapeGull-wing

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Download Datasheet
LTC3405A
1.5MHz, 300mA
Synchronous Step-Down
Regulator in ThinSOT
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
■
DESCRIPTIO
High Efficiency: Up to 96%
Very Low Quiescent Current: Only 20
µ
A
During Operation
300mA Output Current at V
IN
= 3V
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Stable with Ceramic Capacitors
0.8V Reference Allows Low Output Voltages
Shutdown Mode Draws < 1µA Supply Current
±2%
Output Voltage Accuracy
Current Mode Operation for Excellent Line and
Load Transient Response
Overtemperature Protected
Low Profile (1mm) ThinSOT
TM
Package
The LTC
®
3405A is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 20µA and drops to <1µA in shutdown. The 2.5V to
5.5V input voltage range makes the LTC3405A ideally
suited for single Li-Ion battery-powered applications. 100%
duty cycle provides low dropout operation, extending
battery life in portable systems.
Switching frequency is internally set at 1.5MHz, allowing
the use of small surface mount inductors and capacitors.
The LTC3405A is specifically designed to work well with
ceramic output capacitors, achieving very low output
voltage ripple and a small PCB footprint.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.8V feed-
back reference voltage. The LTC3405A is available in a low
profile (1mm) ThinSOT package.
For fixed 1.5V and 1.8V output versions, refer to the
LTC3405A-1.5/LTC3405A-1.8 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
Protected by U.S. Patents, including 6580258, 5481178.
APPLICATIO S
■
■
■
■
■
■
Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
TYPICAL APPLICATIO
V
IN
2.7V
TO 5.5V
4
C
IN
†
2.2µF
CER
V
IN
RUN
MODE
GND
2
V
FB
5
SW
3
LTC3405A
1
6
100
95
V
IN
= 3.6V
4.7µH**
22pF
EFFICIENCY (%)
V
OUT
*
3.3V
C
OUT
††
4.7µF
CER
90
85
80
75
V
IN
= 5.5V
70
65
60
0.1
V
IN
= 4.2V
887k
280k
3405A F01a
*V
OUT
CONNECTED TO V
IN
FOR 2.7V < V
IN
< 3.3V
**MURATA LQH3C4R7M34
†
TAIYO YUDEN LMK212BJ225MG
††
TAIYO YUDEN JMK212BJ475MG
Figure 1a. High Efficiency Step-Down Converter
Figure 1b. Efficiency vs Load Current
3405afa
U
1
100
10
OUTPUT CURRENT (mA)
1000
3405A F01b
U
U
1

LTC3405AES6#PBF Related Products

LTC3405AES6#PBF LTC3405AES6#TR LTC3405AES6#TRM LTC3405AES6#TRMPBF (CUT REEL) LTC3405AES6#TRMPBF LTC3405AES6#TRPBF LTC3405AES6
Description Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23 T/R Conv DC-DC 2.5V to 5.5V Synchronous Step Down Single-Out 0.8V to 6V 0.3A 6-Pin TSOT-23
EU restricts the use of certain hazardous substances Compliant Not Compliant Not Compliant Compliant Compliant Compliant Not Compliant
ECCN (US) - EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed LTB LTB Active Active Active LTB
Type Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 210(Typ) 210(Typ) 210(Typ) 210(Typ) 210(Typ) 210(Typ) 210(Typ)
Switching Regulator Yes Yes Yes Yes Yes Yes Yes
Number of Outputs 1 1 1 1 1 1 1
Output Voltage (V) 0.8 to 6 0.8 to 6 0.8 to 6 0.8 to 6 0.8 to 6 0.8 to 6 0.8 to 6
Maximum Output Current (A) 0.3 0.3 0.3 0.3 0.3 0.3 0.3
Minimum Input Voltage (V) 2.5 2.5 2.5 2.5 2.5 2.5 2.5
Maximum Input Voltage (V) 5.5 5.5 5.5 5.5 5.5 5.5 5.5
Operating Supply Voltage (V) 2.5 to 6 2.5 to 6 2.5 to 6 2.5 to 6 2.5 to 6 2.5 to 6 2.5 to 6
Line Regulation 0.4%/V 0.4%/V 0.4%/V 0.4%/V 0.4%/V 0.4%/V 0.4%/V
Load Regulation 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ) 0.5%(Typ)
Efficiency (%) 96 96 96 96 96 96 96
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended Extended Extended Extended
Pin Count 6 6 6 6 6 6 6
Standard Package Name SOT SOT-23 SOT-23 SOT SOT SOT SOT-23
Supplier Package TSOT-23 TSOT-23 TSOT-23 TSOT-23 TSOT-23 TSOT-23 TSOT-23
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max) 0.9(Max)
Package Length 2.9 2.9 2.9 2.9 2.9 2.9 2.9
Package Width 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max) 1.75(Max)
PCB changed 6 6 6 6 6 6 6
Lead Shape Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 - 8542.39.00.01 8542.39.00.01 8542.39.00.01
Packaging Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel -

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