Datasheet LT8415 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultralow Power Boost Converter with Dual Half-Bridge Switches |
| Pages / Page | 14 / 1 — FEATURES. DESCRIPTION. High Voltage Switches Built In (Dual Half-Bridge). … |
| File Format / Size | PDF / 268 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. High Voltage Switches Built In (Dual Half-Bridge). Ultralow Quiescent Current. 10.5μA in Active Mode
Model Line for this Datasheet
Text Version of Document
LT8415 Ultralow Power Boost Converter with Dual Half-Bridge Switches
FEATURES DESCRIPTION
n
High Voltage Switches Built In (Dual Half-Bridge)
The LT®8415 is an ultralow power boost converter with n
Ultralow Quiescent Current
two integrated complementary MOSFET half-bridges n
10.5μA in Active Mode
(N- and P-channel), integrated power switch, Schottky n
0μA in Shutdown Mode
diode and output disconnect circuitry. The N-channel and n
Comparator Built into SHDN Pin
P-channel MOSFETs in each half-bridge are synchronously n
Low Noise Control Scheme
controlled by a single input pin, and never turn on at the n
Adjustable FB Reference Voltage
same time in typical applications. n
Wide Input Range: 2.5V to 16V
The boost regulator controls power delivery by varying n
Wide Output Range: Up to 40V
both the peak inductor current and switch off-time. This n
Integrated Power NPN Switch (25mA Current Limit)
control scheme results in low output voltage ripple as well n
Integrated Schottky Diode
as high efficiency over a wide load range. The quiescent n
Integrated Output Disconnect
current is a low 10.5μA, which is further reduced to 0μA n High Value (12.4M/0.4M) Feedback Resistor Integrated in shutdown. The internal disconnect circuitry allows the n Built in Soft Start (Optional Capacitor from VREF to GND) output voltage to be blocked from the input during shut- n Over Voltage Protection for CAP, VOUT, OUT1 and down. High value (12.4M/0.4M) resistors are integrated OUT2 Pins on chip for output voltage detection, significantly reducing n 12-Pin 3mm × 2mm DFN package input referred quiescent current. The LT8415 also features a comparator built into the SHDN pin, overvoltage protection
APPLICATIONS
for the CAP, VOUT, OUT1 and OUT2 pins, built in soft start n and comes in a tiny 12-pin 3mm × 2mm DFN package. Sensor Power n L RF Mems Relay Power , 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 n Low Power Actuator Bias/Control 5481178, 6580258, 6304066, 6127815, 6498466, 6611131. n Liquid Lens Driver
TYPICAL APPLICATION Drive External Capacitors to 34V/0V with the LT8415 Response Driving External Capacitors
VIN 2.5V to 16V 100µH OUT2 VOLTAGE 2.2µF 22nF 20/DIV SW CAP V IN2 VOLTAGE CC VOUT VOUT = 34V 2V/DIV LT8415 0.1µF* OUT1 VOLTAGE LOGIC IN 1 OUT 1 34V/0V 20/DIV LEVEL IN 2 OUT 2 CHIP VREF IN1 VOLTAGE ENABLE SHDN 34V/0V 2V/DIV 137K C 20µs/DIV 8415 TA02 GND FBP OUT1 = 1nF COUT2 = 200pF 887K 0.1µF** *HIGHER VALUE CAPACITOR IS REQUIRED WHEN THE VIN IS HIGHER THAN 8V 8415 TA01 **THIS CAPACITOR IS OPTIONAL 8415fb For more information www.linear.com/LT8415 1
FEATURES DESCRIPTION
n
High Voltage Switches Built In (Dual Half-Bridge)
The LT®8415 is an ultralow power boost converter with n
Ultralow Quiescent Current
two integrated complementary MOSFET half-bridges n
10.5μA in Active Mode
(N- and P-channel), integrated power switch, Schottky n
0μA in Shutdown Mode
diode and output disconnect circuitry. The N-channel and n
Comparator Built into SHDN Pin
P-channel MOSFETs in each half-bridge are synchronously n
Low Noise Control Scheme
controlled by a single input pin, and never turn on at the n
Adjustable FB Reference Voltage
same time in typical applications. n
Wide Input Range: 2.5V to 16V
The boost regulator controls power delivery by varying n
Wide Output Range: Up to 40V
both the peak inductor current and switch off-time. This n
Integrated Power NPN Switch (25mA Current Limit)
control scheme results in low output voltage ripple as well n
Integrated Schottky Diode
as high efficiency over a wide load range. The quiescent n
Integrated Output Disconnect
current is a low 10.5μA, which is further reduced to 0μA n High Value (12.4M/0.4M) Feedback Resistor Integrated in shutdown. The internal disconnect circuitry allows the n Built in Soft Start (Optional Capacitor from VREF to GND) output voltage to be blocked from the input during shut- n Over Voltage Protection for CAP, VOUT, OUT1 and down. High value (12.4M/0.4M) resistors are integrated OUT2 Pins on chip for output voltage detection, significantly reducing n 12-Pin 3mm × 2mm DFN package input referred quiescent current. The LT8415 also features a comparator built into the SHDN pin, overvoltage protection
APPLICATIONS
for the CAP, VOUT, OUT1 and OUT2 pins, built in soft start n and comes in a tiny 12-pin 3mm × 2mm DFN package. Sensor Power n L RF Mems Relay Power , 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 n Low Power Actuator Bias/Control 5481178, 6580258, 6304066, 6127815, 6498466, 6611131. n Liquid Lens Driver
TYPICAL APPLICATION Drive External Capacitors to 34V/0V with the LT8415 Response Driving External Capacitors
VIN 2.5V to 16V 100µH OUT2 VOLTAGE 2.2µF 22nF 20/DIV SW CAP V IN2 VOLTAGE CC VOUT VOUT = 34V 2V/DIV LT8415 0.1µF* OUT1 VOLTAGE LOGIC IN 1 OUT 1 34V/0V 20/DIV LEVEL IN 2 OUT 2 CHIP VREF IN1 VOLTAGE ENABLE SHDN 34V/0V 2V/DIV 137K C 20µs/DIV 8415 TA02 GND FBP OUT1 = 1nF COUT2 = 200pF 887K 0.1µF** *HIGHER VALUE CAPACITOR IS REQUIRED WHEN THE VIN IS HIGHER THAN 8V 8415 TA01 **THIS CAPACITOR IS OPTIONAL 8415fb For more information www.linear.com/LT8415 1
