Datasheet LTC4361-1, LTC4361-2 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Overvoltage/Overcurrent Protection Controller |
| Páginas / Página | 16 / 1 — FEATURES. DESCRIPTION. 2.5V to 5.5V Operation. Overvoltage Protection Up … |
| Revisión | C |
| Formato / tamaño de archivo | PDF / 628 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. 2.5V to 5.5V Operation. Overvoltage Protection Up to 80V. No Input Capacitor or TVS Required for Most
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- LTC4361CDC-1#PBF LTC4361CDC-1#TRMPBF LTC4361CDC-1#TRPBF LTC4361CDC-2#PBF LTC4361CDC-2#TRMPBF LTC4361CDC-2#TRPBF LTC4361CTS8-1#PBF LTC4361CTS8-1#TRMPBF LTC4361CTS8-1#TRPBF LTC4361CTS8-2#PBF LTC4361CTS8-2#TRMPBF LTC4361CTS8-2#TRPBF LTC4361HDC-1#PBF LTC4361HDC-1#TRMPBF LTC4361HDC-1#TRPBF LTC4361HDC-2#PBF LTC4361HDC-2#TRMPBF LTC4361HDC-2#TRPBF LTC4361HTS8-1#PBF LTC4361HTS8-1#TRMPBF LTC4361HTS8-1#TRPBF LTC4361HTS8-2#PBF LTC4361HTS8-2#TRMPBF LTC4361HTS8-2#TRPBF LTC4361IDC-1#PBF LTC4361IDC-1#TRMPBF LTC4361IDC-1#TRPBF LTC4361IDC-2#PBF LTC4361IDC-2#TRMPBF LTC4361IDC-2#TRPBF LTC4361ITS8-1#PBF LTC4361ITS8-1#TRMPBF LTC4361ITS8-1#TRPBF LTC4361ITS8-2#PBF LTC4361ITS8-2#TRMPBF LTC4361ITS8-2#TRPBF
Versión de texto del documento
LTC4361-1/LTC4361-2 Overvoltage/Overcurrent Protection Controller
FEATURES DESCRIPTION
n
2.5V to 5.5V Operation
The LTC®4361 overvoltage/overcurrent protection con- n
Overvoltage Protection Up to 80V
troller safeguards 2.5V to 5.5V systems from input sup- n
No Input Capacitor or TVS Required for Most
ply overvoltage. It is designed for portable devices with
Applications
multiple power supply options including wall adaptors, n
2% Accurate 5.8V Overvoltage Threshold
car battery adaptors and USB ports. n
10% Accurate 50mV Overcurrent Circuit Breaker
The LTC4361 controls an external N-channel MOSFET n
<1µs Overvoltage Turn-Off, Gentle Shutdown
in series with the input power supply. During overvolt- n Controls N-Channel MOSFET age transients, the LTC4361 turns off the MOSFET within n Adjustable Power-Up dV/dt Limits Inrush Current 1µs, isolating downstream components from the input n Reverse Voltage Protection supply. Inductive cable transients are absorbed by the n Power Good Output MOSFET and load capacitance. In most applications, the n Low Current Shutdown LTC4361 provides protection from transients up to 80V n Latchoff (LTC4361-1) or Auto-Retry (LTC4361-2) without requiring transient voltage suppressors or other After Overcurrent external components. n Available in 8-Lead ThinSOT™ and 8-Lead (2mm × 2mm) DFN Packages The LTC4361 has a delayed start-up and adjustable dV/ dt ramp-up for inrush current limiting. A PWRGD pin
APPLICATIONS
provides power good monitoring for VIN. The LTC4361 features a soft shutdown controlled by the ON pin and n USB Protection drives an optional external P-channel MOSFET for nega- n Handheld Computers tive voltage protection. Following an overvoltage condi- n Cell/Smart Phones tion, the LTC4361 automatically restarts with a start-up n MP3/MP4 Players delay. After an overcurrent fault, the LTC4361-1 remains n Digital Cameras off while the LTC4361-2 automatically restarts after a 130ms start-up delay. All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION Output Protected from Overvoltage at Input Protection from Overvoltage and Overcurrent
VIN 0.025Ω Si1470DH VOUT VIN 5V 5V 1.5A COUT GATE VOUT SENSE OUT VIN, VOUT 5V/DIV IN LTC4361 VGATE 10V/DIV ON PWRGD GND 436112 TA01a 0.5µs/DIV 436112 TA01b Si1470DH COUT = 10µF Rev C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
2.5V to 5.5V Operation
The LTC®4361 overvoltage/overcurrent protection con- n
Overvoltage Protection Up to 80V
troller safeguards 2.5V to 5.5V systems from input sup- n
No Input Capacitor or TVS Required for Most
ply overvoltage. It is designed for portable devices with
Applications
multiple power supply options including wall adaptors, n
2% Accurate 5.8V Overvoltage Threshold
car battery adaptors and USB ports. n
10% Accurate 50mV Overcurrent Circuit Breaker
The LTC4361 controls an external N-channel MOSFET n
<1µs Overvoltage Turn-Off, Gentle Shutdown
in series with the input power supply. During overvolt- n Controls N-Channel MOSFET age transients, the LTC4361 turns off the MOSFET within n Adjustable Power-Up dV/dt Limits Inrush Current 1µs, isolating downstream components from the input n Reverse Voltage Protection supply. Inductive cable transients are absorbed by the n Power Good Output MOSFET and load capacitance. In most applications, the n Low Current Shutdown LTC4361 provides protection from transients up to 80V n Latchoff (LTC4361-1) or Auto-Retry (LTC4361-2) without requiring transient voltage suppressors or other After Overcurrent external components. n Available in 8-Lead ThinSOT™ and 8-Lead (2mm × 2mm) DFN Packages The LTC4361 has a delayed start-up and adjustable dV/ dt ramp-up for inrush current limiting. A PWRGD pin
APPLICATIONS
provides power good monitoring for VIN. The LTC4361 features a soft shutdown controlled by the ON pin and n USB Protection drives an optional external P-channel MOSFET for nega- n Handheld Computers tive voltage protection. Following an overvoltage condi- n Cell/Smart Phones tion, the LTC4361 automatically restarts with a start-up n MP3/MP4 Players delay. After an overcurrent fault, the LTC4361-1 remains n Digital Cameras off while the LTC4361-2 automatically restarts after a 130ms start-up delay. All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION Output Protected from Overvoltage at Input Protection from Overvoltage and Overcurrent
VIN 0.025Ω Si1470DH VOUT VIN 5V 5V 1.5A COUT GATE VOUT SENSE OUT VIN, VOUT 5V/DIV IN LTC4361 VGATE 10V/DIV ON PWRGD GND 436112 TA01a 0.5µs/DIV 436112 TA01b Si1470DH COUT = 10µF Rev C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts