LTC4360CSC8-1TRMPBF LINER [Linear Technology], LTC4360CSC8-1TRMPBF Datasheet

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LTC4360CSC8-1TRMPBF

Manufacturer Part Number
LTC4360CSC8-1TRMPBF
Description
Overvoltage Protection Controller
Manufacturer
LINER [Linear Technology]
Datasheet
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APPLICATIONS
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT, PowerPath, How Swap and No R
Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
FEATURES
2.5V to 5.5V Operation
Overvoltage Protection Up to 80V
No Input Capacitor or TVS Required for Most
Applications
2% Accurate 5.8V Overvoltage Threshold
Controls N-Channel MOSFET
<1μs Overvoltage Turn-Off, Gentle Shutdown
Adjustable Power-Up dV/dt Limits Inrush
Reverse Voltage Protection (LTC4360-2)
Power Good Output
Low Current Shutdown (LTC4360-1)
Available in a Tiny 8-Lead SC70 Package
USB Protection
Handheld Computers
Cell/Smart Phones
MP3/MP4 Players
Digital Cameras
V
5V
IN
Protection from Overvoltage
IN
ON
LTC4360-1
Si1470DH
GATE
GND
PWRGD
SENSE
OUT
are trademarks of Linear Technology
436012 TA01a
C
OUT
V
5V
1.5A
OUT
DESCRIPTION
The LTC
2.5V to 5.5V systems from power supply overvoltage. It is
designed for portable devices with multiple power supply
options including wall adaptors, car battery adaptors and
USB ports.
The LTC4360 controls an external N-channel MOSFET in
series with the input power supply. During overvoltage
transients, the LTC4360 turns off the MOSFET within 1μs,
isolating downstream components from the input supply.
Inductive cable transients are absorbed by the MOSFET
and load capacitance. In most applications, the LTC4360
provides protection from transients up to 80V without
requiring transient voltage suppressors or other external
components.
The LTC4360 has a delayed start-up and an adjustable dV/dt
ramp-up for inrush current limiting. A PWRGD pin provides
power good monitoring for V
age condition, the LTC4360 automatically restarts with a
start-up delay. The LTC4360-1 features a soft shutdown
controlled by the ON pin, while the LTC4360-2 controls an
optional external P-channel MOSFET for negative voltage
protection.
V
Overvoltage Protection
IN
10V/DIV
5V/DIV
®
, V
V
4360 overvoltage protection controller safeguards
GATE
OUT
Output Protected from Overvoltage at Input
LTC4360-1/LTC4360-2
Si1470DH
C
OUT
= 10μF
0.5μs/DIV
IN
. Following an overvolt-
V
V
OUT
IN
Controller
436012 TA01b
436012f
1

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LTC4360CSC8-1TRMPBF Summary of contents

Page 1

FEATURES n 2.5V to 5.5V Operation n Overvoltage Protection Up to 80V n No Input Capacitor or TVS Required for Most Applications n 2% Accurate 5.8V Overvoltage Threshold n Controls N-Channel MOSFET n <1μs Overvoltage Turn-Off, Gentle Shutdown n Adjustable ...

Page 2

... Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL LTC4360CSC8-1#TRMPBF LTC4360CSC8-1#TRPBF LTC4360CSC8-2#TRMPBF LTC4360CSC8-2#TRPBF LTC4360ISC8-1#TRMPBF LTC4360ISC8-1#TRPBF LTC4360ISC8-2#TRMPBF LTC4360ISC8-2#TRPBF TRM = 500 pieces. *Temperature grades are identifi label on the shipping container. Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Supplies V Input Voltage Range IN V Input Undervoltage Lockout IN(UVL) I Input Supply Current IN Thresholds V IN Pin Overvoltage Threshold IN(OV) ΔV Overvoltage Hysteresis OV External ...

Page 4

LTC4360-1/LTC4360-2 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° 5V (LTC4360-1) unless otherwise noted Input Supply Current vs Input Voltage 1000 LTC4360 0V, LTC4360-2) ON 100 V = 2.5V ON (LTC4360-1) 10 ...

Page 5

PIN FUNCTIONS GATE: Gate Drive for External N-Channel MOSFET. An internal charge pump provides a 10μA pull-up current to charge the gate of the external N-channel MOSFET. An additional ramp circuit limits the GATE ramp rate when turning on to ...

Page 6

LTC4360-1/LTC4360-2 OPERATION Mobile devices like cell phones and MP3/MP4 players have highly integrated subsystems fabricated from deep submi- cron CMOS processes. The small form factor is accompanied by low absolute maximum voltage ratings. The sensitive electronics are susceptible to damage ...

Page 7

APPLICATIONS INFORMATION The GATE ramp rate is limited to 3V/ms similar rate which results in an inrush current into the load capacitor C of: OUT dV GATE = • INRUSH OUT OUT dt The ...

Page 8

LTC4360-1/LTC4360-2 APPLICATIONS INFORMATION MOSFET Confi gurations and Selection The LTC4360 can be used with various external MOSFET confi gurations (see Figure 3). The simplest confi guration is a single N-channel MOSFET. It has the lowest R voltage drop and is ...

Page 9

APPLICATIONS INFORMATION WALL ADAPTOR AC/ CABLE + CABLE V IN 20V/DIV V OUT 1V/DIV I CABLE 5A/DIV 5μs/DIV FDC5612 R = 150mΩ 0.7μ LOAD = 10Ω 10μF OUT ...

Page 10

LTC4360-1/LTC4360-2 APPLICATIONS INFORMATION Figure 8 shows a particularly severe situation which can occur in a mobile device with dual power inputs. A 20V wall adaptor is mistakenly hot-plugged into the 5V device with the USB input already live. As shown ...

Page 11

PACKAGE DESCRIPTION 0.30 0.50 MAX REF 2.8 BSC 1.8 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.10 – 0.40 GAUGE PLANE 0.15 BSC 0.26 – 0.46 NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ...

Page 12

LTC4360-1/LTC4360-2 TYPICAL APPLICATION 5V System Protected from ±24V Power Supplies Si3590DV GATE IN OUT LTC4360-2 PWRGD GATEP GND RELATED PARTS PART NUMBER DESCRIPTION LTC2935 Ultralow Power Supervisor with Eight Pin-Selectable Thresholds LT3008 20mA, 45V, 3μA ...

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