参数资料
| 型号： | LT8415IDDB#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 25MA 12DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 40 V |
| 输入电压： | 2.5 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 800kHz |
| 电流 - 输出： | 25mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN-EP（3x2） |
LT8415
Ultralow Power Boost
Converter with Dual
Half-Bridge Switches
FEATURES
DESCRIPTION
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High Voltage Switches Built in (Dual half-bridge)
Ultralow Quiescent Current
10.5μA in Active Mode
0μA in Shutdown Mode
Comparator Built into SHDN pin
Low Noise Control Scheme
Adjustable FB reference voltage
The LT ? 8415 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.
High Value (12.4M/0.4M) Feedback Resistor Integrated
Built in Soft Start (Optional Capacitor from V REF to GND)
Over Voltage Protection for CAP, V OUT , OUT1 and
12-Pin 3mm × 2mm DFN package
Sensor Power
RF Mems Relay Power
Low Power Actuator Bias/Control
Liquid Lens Driver
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
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OUT2 Pins
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APPLICATIONS
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TYPICAL APPLICATION
Drive External Capacitors to 34V/0V with the LT8415
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 ef?ciency 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, signi?cantly reducing
input referred quiescent current. The LT8415 also features a
comparator built into the SHDN pin, overvoltage protection
for the CAP, V OUT , OUT1 and OUT2 pins, built in soft start
and comes in a tiny 12-pin 3mm × 2mm DFN package.
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.
Response Driving External Capacitors
V IN
2.5V to 16V
100μH
OUT2 VOLTAGE
2.2μF
22nF
20/DIV
SW
V CC
CAP
V OUT
V OUT = 34V
IN2 VOLTAGE
2V/DIV
LT8415
0.1μF*
LOGIC
LEVEL
IN 1
IN 2
OUT 1
OUT 2
34V/0V
OUT1 VOLTAGE
20/DIV
CHIP
ENABLE
SHDN
GND
V REF
FBP
137K
34V/0V
IN1 VOLTAGE
2V/DIV
C OUT1 = 1nF
C OUT2 = 200pF
20μs/DIV
8415 TA02
*HIGHER VALUE CAPACITOR IS REQUIRED
WHEN THE V IN IS HIGHER THAN 8V
**THIS CAPACITOR IS OPTIONAL
887K
0.1μF**
8415 TA01
8415f
1
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