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LTC3410ESC6-1.5#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC3410
3410fb
OUTPUT CURRENT (mA)
0.1
0
10
20
30
40
EFFICIENCY (%)
POWER LOSS (W)
50
60
70
80
90
100 1
0.1
0.01
0.001
0.0001
10 1001 1000
3410 TA01b
EFFICIENCY
POWER LOSS
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
■
High Efficiency: Up to 96%
■
Low Ripple (20mV
P-P
) Burst Mode Operation: I
Q
26
µ
A
■
Low Output Voltage Ripple
■
300mA Output Current at V
IN
= 3V
■
380mA Minimum Peak Switch Current
■
2.5V to 5.5V Input Voltage Range
■
2.25MHz 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
■
Available in Low Profile SC70 Package
The LTC
®
3410 is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. The device is available in adjustable
and fixed output voltage versions. Supply current during
operation is only 26µA, dropping to <1µA in shutdown.
The 2.5V to 5.5V input voltage range makes the LTC3410
ideally suited for single Li-Ion battery-powered applica-
tions. 100% duty cycle provides low dropout operation,
extending battery life in portable systems.
Switching frequency is internally set at 2.25MHz, allowing
the use of small surface mount inductors and capacitors.
The LTC3410 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 LTC3410 is available in a tiny,
low profile SC70 package.
■
Cellular Telephones
■
Wireless and DSL Modems
■
Digital Cameras
■
MP3 Players
■
Portable Instruments
2.25MHz, 300mA
Synchronous Step-Down
Regulator in SC70
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
Efficiency and Power Loss
vs Output Current
V
IN
C
IN
4.7µF
CER
V
IN
2.7V
TO 5.5V
LTC3410
RUN
4.7µH
10pF
887k
412k
3410 TA01a
SW
V
FB
GND
C
OUT
4.7µF
CER
V
OUT
2.5V
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 5994885.
2
LTC3410
3410fb
LTC3410ESC6
ORDER PART NUMBER
Input Supply Voltage .................................. – 0.3V to 6V
RUN, V
FB
Voltages ..................................... – 0.3V to V
IN
SW Voltage (DC) ......................... –0.3V to (V
IN
+ 0.3V)
P-Channel Switch Source Current (DC) ............. 500mA
N-Channel Switch Sink Current (DC) ................. 500mA
SC6 PART MARKING
Consult LTC Marketing for parts specified with wider operating temperature ranges. *A separate data sheet is available for the LT3410-1.875.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
T
JMAX
= 125°C, θ
JA
= 250°C/ W
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
LBSD
Peak SW Sink and Source Current .................... 630mA
Operating Temperature Range (Note 2) .. –40°C to 85°C
Junction Temperature (Notes 3, 5) ...................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
(Note 1)
RUN 1
GND 2
SW 3
6 V
FB
5 GND
4 V
IN
TOP VIEW
SC6 PACKAGE
6-LEAD PLASTIC SC70
RUN 1
GND 2
SW 3
6 V
OUT
5 GND
4 V
IN
TOP VIEW
SC6 PACKAGE
6-LEAD PLASTIC SC70
T
JMAX
= 125°C, θ
JA
= 250°C/ W
LTC3410ESC6-1.2
LTC3410ESC6-1.5
LTC3410ESC6-1.65
LTC3410ESC6-1.8
LTC3410ESC6-1.875*
ORDER PART NUMBER
SC6 PART MARKING
LCHV
LCNB
LCJF
LCNC
LCFQ
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
VFB
Feedback Current Adjustable Output Voltage ● ±30 nA
I
VOUT
Output Voltage Feedback Current Fixed Output Voltage ● 3.3 6 µA
I
PK
Peak Inductor Current V
IN
= 3V, V
FB
= 0.7V or V
OUT
= 90%, Duty Cycle < 35% 380 490 mA
V
FB
Regulated Feedback Voltage Adjustable Output Voltage (LTC3410E) ● 0.784 0.8 0.816 V
∆V
FB
Reference Voltage Line Regulation V
IN
= 2.5V to 5.5V ● 0.04 0.4 %/V
V
OUT
Regulated Output Voltage LTC3410-1.2, I
OUT
= 100mA ● 1.176 1.2 1.224 V
LTC3410-1.5, I
OUT
= 100mA ● 1.47 1.5 1.53 V
LTC3410-1.65, I
OUT
= 100mA ● 1.617 1.65 1.683 V
LTC3410-1.8, I
OUT
= 100mA ● 1.764 1.8 1.836 V
LTC3410-1.875, I
OUT
= 100mA ● 1.837 1.875 1.913 V
∆V
OUT
Output Voltage Line Regulation V
IN
= 2.5V to 5.5V ● 0.04 0.4 %/V
V
LOADREG
Output Voltage Load Regulation I
LOAD
= 50mA to 250mA 0.5 %
V
IN
Input Voltage Range ● 2.5 5.5 V
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
3
LTC3410
3410fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
UVLO
Undervoltage Lockout Threshold V
IN
Rising 2 2.3 V
V
IN
Falling 1.94 V
I
S
Input DC Bias Current (Note 4)
Burst Mode
®
Operation V
FB
= 0.83V or V
OUT
= 104%, I
LOAD
= 0A 26 35 µA
Shutdown V
RUN
= 0V 0.1 1 µA
f
OSC
Oscillator Frequency V
FB
= 0.8V or V
OUT
= 100% ● 1.8 2.25 2.7 MHz
V
FB
= 0V or V
OUT
= 0V 310 kHz
R
PFET
R
DS(ON)
of P-Channel FET I
SW
= 100mA 0.75 0.9 Ω
R
NFET
R
DS(ON)
of N-Channel FET I
SW
= –100mA 0.55 0.7 Ω
I
LSW
SW Leakage V
RUN
= 0V, V
SW
= 0V or 5V, V
IN
= 5V ±0.01 ±1 µA
V
RUN
RUN Threshold ● 0.3 1 1.5 V
I
RUN
RUN Leakage Current ● ±0.01 ±1 µA
Burst Mode is a registered trademark of Linear Technology Corporation.
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3410E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC3410: T
J
= T
A
+ (P
D
)(250°C/W)
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Efficiency vs Input Voltage
Efficiency vs Output Current
(From Figure1 Except for the Resistive Divider Resistor Values)
INPUT VOLTAGE (V)
2.5
100
90
80
70
60
50
40
30
45
3410 G02
3 3.5
4.5 5.5
EFFFICIENCY (%)
I
OUT
= 10mA
I
OUT
= 0.1mA
I
OUT
= 100mA
V
OUT
= 1.8V
I
OUT
= 1mA
I
OUT
= 250mA
OUTPUT CURRENT (mA)
0.1
0
10
20
30
40
EFFICIENCY (%)
50
60
70
80
90
100
10 1001 1000
3410 G03
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
Efficiency vs Output Current
OUTPUT CURRENT (mA)
0.1
0
10
20
30
40
EFFICIENCY (%)
50
60
70
80
90
100
10 1001 1000
3410 G04
V
OUT
= 1.2V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3410ESC6-1.5#TRPBF

Mfr. #:
Buy LTC3410ESC6-1.5#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 300mA, 2.25MHz Synch Step-Dwn in SC70 (fixed 1.5V output)
Lifecycle:
New from this manufacturer.
Delivery:
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