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| 型號： | LT8415EDDB#TRMPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.03 A SWITCHING REGULATOR, PDSO12 |
| 封裝： | 3 X 2 MM, LEAD FREE, PLASTIC, DFN-12 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 182K |
| 代理商： | LT8415EDDB#TRMPBF |
LT8415
1
8415f
TYPICAL APPLICATION
DESCRIPTION
Ultralow Power Boost
Converter with Dual
Half-Bridge Switches
The LT8415 is an ultralow power boost converter with
two integrated complementary MOSFET half-bridges
(N- and P-channel), integrated power switch, Schottky
diode and output disconnect circuitry. The N-channel and
P-channel MOSFETs in each half-bridge are synchronously
controlled by a single input pin, and never turn on at the
same time in typical applications.
The boost regulator controls power delivery by varying
both the peak inductor current and switch off-time. This
control scheme results in low output voltage ripple as well
as high efciency over a wide load range. The quiescent
current is a low 10.5μA, which is further reduced to 0μA
in shutdown. The internal disconnect circuitry allows the
output voltage to be blocked from the input during shut-
down. High value (12.4M/0.4M) resistors are integrated
on chip for output voltage detection, signicantly reducing
input referred quiescent current. The LT8415 also features a
comparator built into the SHDN pin, overvoltage protection
for the CAP, VOUT, OUT1 and OUT2 pins, built in soft start
and comes in a tiny 12-pin 3mm × 2mm DFN package.
Drive External Capacitors to 34V/0V with the LT8415
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Hot Swap
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, 6127815,
6498466, 6611131.
FEATURES
APPLICATIONS
n High Voltage Switches Built in (Dual half-bridge)
n Ultralow Quiescent Current
10.5μA in Active Mode
0μA in Shutdown Mode
n Comparator Built into SHDN pin
n Low Noise Control Scheme
n Adjustable FB reference voltage
n Wide Input Range: 2.5V to 16V
n Wide Output Range: Up to 40V
n Integrated Power NPN Switch (25mA Current Limit)
n Integrated Schottky Diode
n Integrated Output Disconnect
n High Value (12.4M/0.4M) Feedback Resistor Integrated
n Built in Soft Start (Optional Capacitor from VREF to GND)
n Over Voltage Protection for CAP, VOUT, OUT1 and
OUT2 Pins
n 12-Pin 3mm × 2mm DFN package
n Sensor Power
n RF Mems Relay Power
n Low Power Actuator Bias/Control
n Liquid Lens Driver
SW
CAP
GND
FBP
OUT 2
OUT 1
IN 2
IN 1
8415 TA01
LT8415
2.2μF
0.1μF**
LOGIC
LEVEL
CHIP
ENABLE
100μH
22nF
0.1μF*
VOUT = 34V
VIN
2.5V to 16V
VCC
VOUT
VREF
SHDN
137K
887K
*HIGHER VALUE CAPACITOR IS REQUIRED
WHEN THE VIN IS HIGHER THAN 8V
**THIS CAPACITOR IS OPTIONAL
34V/0V
OUT2 VOLTAGE
20/DIV
OUT1 VOLTAGE
20/DIV
IN2 VOLTAGE
2V/DIV
IN1 VOLTAGE
2V/DIV
COUT1 = 1nF
COUT2 = 200pF
20μs/DIV
8415 TA02
Response Driving External Capacitors
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