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LTC3564EDCB#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
1
LTC3564
3564f
■
High Efficiency: Up to 96%
■
Very Low Quiescent Current: Only 20
μ
A
■
1.25A Output Current
■
2.5V to 5.5V Input Voltage Range
■
2.25MHz Constant Frequency Operation
■
No Schottky Diode Required
■
Low Dropout Operation: 100% Duty Cycle
■
0.6V Reference Allows Low Output Voltages
■
Shutdown Mode Draws ≤1μA Supply Current
■
Current Mode Operation for Excellent Line and
Load Transient Response
■
Overtemperature Protected
■
Low Profile (1mm) ThinSOT
TM
and
6-Lead (2mm × 3mm) DFN Packages
The LTC
®
3564 is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 20μA, dropping to ≤1μA in shutdown. The 2.5V to
5.5V input voltage range makes the LTC3564 ideally suited
for single Li-Ion battery-powered or 3.3V to 5V input
voltage applications. 100% duty cycle provides low drop-
out operation, extending battery life in portable systems.
Automatic Burst Mode
®
operation increases efficiency at
light loads, further extending battery runtime.
Switching frequency is internally set at 2.25MHz, allowing
the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.6V feed-
back reference voltage. The LTC3564 is available in low
profile (1mm) ThinSOT and 6-Lead (2mm × 3mm) DFN
packages.
■
Cellular Telephones
■
Wireless and DSL Modems
■
Digital Still Cameras
■
Media Players
■
Portable Instruments
■
Point of Load Regulation
2.25MHz, 1.25A
Synchronous
Step-Down Regulator
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5481178, 6580258, 6304066, 6498466, 6611131.
V
IN
C
IN
22μF
CER
V
IN
LTC3564
RUN
1.1μH
22pF
634k
316k
3564 TA01a
SW
V
FB
GND
C
OUT
22μF
CER
V
OUT
1.8V
OUTPUT CURRENT (mA)
0.1
40
EFFICIENCY (%)
POWER LOSS (W)
50
60
70
80
1 10 100 1000 10000
3564 TA01b
30
20
10
0
90
100
0.0001
0.001
0.01
0.1
0.00001
1
10
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
2
LTC3564
3564f
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)
(Note 1)
Operating Junction Temperature Range
(Notes 2, 3, 6) ...................................... – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ABSOLUTE AXI U RATI GS
W
WW
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
VFB
Feedback Current ● ±30 nA
V
FB
Regulated Feedback Voltage (Note 4) ● 0.5880 0.6 0.6120 V
ΔV
FB
Reference Voltage Line Regulation V
IN
= 2.5V to 5.5V (Note 4) 0.04 0.4 %/V
I
PK
Peak Inductor Current V
IN
= 3V, V
FB
= 0.5V, Duty Cycle < 35% 1.5 2.0 2.5 A
V
LOADREG
Output Voltage Load Regulation 0.5 %
V
IN
Input Voltage Range ● 2.5 5.5 V
The ● denotes specifications which apply over the full operating junction temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
T
JMAX
= 125°C, θ
JA
= 215°C/ W, θ
JC
= 50°C/ W
V
FB
1
GND 2
V
IN
3
5 RUN
4 SW
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
TOP VIEW
RUN
SGND
V
FB
SW
PGND
V
IN
DCB PACKAGE
6-LEAD (2mm × 3mm) PLASTIC DFN
4
5
7
6
3
2
1
T
JMAX
= 125°C, θ
JA
= 64°C/ W, θ
JC
= 10.6°C/ W
EXPOSED PAD (PIN 7) IS SGND, MUST BE SOLDERED TO PCB
PI CO FIGURATIO
UUU
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3564ES5#PBF LTC3564ES5#TRPBF LTCYJ 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC3564IS5#PBF LTC3564IS5#TRPBF LTCYJ 5-Lead Plastic TSOT-23 –40°C to 125°C
LTC3564EDCB#PBF LTC3564EDCB#TRPBF LDTQ 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C
LTC3564IDCB#PBF LTC3564IDCB#TRPBF LDTQ 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ORDER I FOR ATIO
UUW
3
LTC3564
3564f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
S
Input DC Bias Current (Note 5)
Active Mode V
FB
= 0.5V or V
OUT
= 90%, I
LOAD
= 0A 300 400 μA
Sleep Mode V
FB
= 0.62V or V
OUT
= 103%, I
LOAD
= 0A 20 35 μA
Shutdown V
RUN
= 0V, V
IN
= 4.2V 0.1 1 μA
f
OSC
Oscillator Frequency V
FB
= 0.6V or V
OUT
= 100% ● 1.8 2.25 2.7 MHz
R
PFET
R
DS(ON)
of P-Channel FET S5 Package 0.15 0.2 Ω
DCB Package 0.15 Ω
R
NFET
R
DS(ON)
of N-Channel FET S5 Package 0.15 0.2 Ω
DCB Package 0.15 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
t
SOFTSTART
Soft-Start Time V
FB
from 10% to 90% Full Scale 0.6 0.9 1.2 ms
The ● denotes specifications which apply over the full operating junction 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
reliabilty and lifetime.
Note 2: The LTC3564E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C to
125°C operating junction termperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3564I is guaranteed over the full –40°C to 125°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC3564ES5: T
J
= T
A
+ (P
D
)(215°C/W)
LTC3564EDCB: T
J
= T
A
+ (P
D
)(64°C/W)
Note 4: The LTC3564 is tested in a proprietary test mode.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: 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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC3564EDCB#TRPBF

Mfr. #:
Buy LTC3564EDCB#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 2.25MHz, 1.25A Synchronous Step-Down Regulator Step-Down Regulator in ThinSOT
Lifecycle:
New from this manufacturer.
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