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參數(shù)資料
| 型號： | LTC3672BEDC-2#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 165K |
| 代理商： | LTC3672BEDC-2#PBF |
LTC3672B-2
1
3672b2fa
n Triple Output Supply From a Single 2.9V to 5.5V Input
n Buck DC/DC: Fixed 1.2V Output, Up to 400mA
n LDO1: Fixed 2.8V Output, Up to 150mA
n LDO2: Fixed 1.8V Output, Up to 150mA
n ±2.5% Reference Accuracy
n Constant-Frequency 2.25MHz Operation
n Minimum External Component Count
n Current Mode Operation for Excellent Line and Load
Transient Response
n Internal Soft-Start for Each Output
n Single Enable Pin Turns On/Shuts Down All Three
Outputs
n Tiny 2mm
× 2mm × 0.75mm DFN Package
ILOAD (mA)
0
EFFICIENCY
(%)
80
90
400
70
60
100
200
300
50
150
250
350
100
75
85
65
95
3672B2 TA01b
VIN = 2.9V
VIN = 5.5V
VIN = 3.6V
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Monolithic Fixed-Output
400mA Buck Regulator with Dual
150mA LDOs in 2mm
× 2mm DFN
The LTC3672B-2 is a triple power supply composed of
a 400mA synchronous buck regulator and two 150mA
low-dropout linear regulators (LDOs). Constant-frequency
2.25MHz operation is maintained down to very light loads.
The input supply range of 2.9V to 5.5V is especially well-
suited for single-cell Lithium-Ion and Lithium-Polymer
applications, and for powering low voltage ASICs from
3.3V or 5V rails.
The LTC3672B-2 regulates 1.2V at the buck output, 2.8V
at the LDO1 output, and 1.8V at the LDO2 output. Exter-
nal component count is minimal—all that is needed is a
single inductor, an input capacitor, and output capacitors
for each of the three outputs. Control loop compensation
is internal to the LTC3672B-2.
The LTC3672B-2 is available in a 2mm
× 2mm × 0.75mm
8-Lead DFN package.
Buck DC/DC Efciency vs Buck Load
n DMB and DVB-H Cellphones
n Handheld Products (PDA, PMP, GPS)
n Multivoltage Power for Digital Logic, I/O, FPGAs,
CPLDs, ASICs, CPUs, and RF Chipsets
LTC3672B-2
GND
ENALL
SW
VOUT2
2.8V, UP TO 150mA
(SUBJECT TO DROPOUT
LIMITATIONS)
VOUT1
1.2V
400mA
VIN
2.9V TO 5.5V
VOUT3
1.8V
150mA
ENABLE
INPUT
BUCKOUT
VIN VIN1
LDO1
LDO2
3672B2 TA01
1μF
4.7μF
4.7μH
2.2μF
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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