LTC4217CDHC-12#PBF Linear Technology, LTC4217CDHC-12#PBF Datasheet

IC CTRLR HOT SWAP 2A 16-DFN

LTC4217CDHC-12#PBF

Manufacturer Part Number
LTC4217CDHC-12#PBF
Description
IC CTRLR HOT SWAP 2A 16-DFN
Manufacturer
Linear Technology
Type
Hot-Swap Switchr
Datasheet

Specifications of LTC4217CDHC-12#PBF

Applications
General Purpose
Internal Switch(s)
Yes
Current Limit
2.0A
Voltage - Supply
2.9 V ~ 26.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-WFDFN Exposed Pad
Linear Misc Type
Positive Low Voltage
Package Type
DFN EP
Operating Supply Voltage (min)
2.9V
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Product Depth (mm)
3mm
Product Length (mm)
5mm
Mounting
Surface Mount
Pin Count
16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC4217CDHC-12#PBFLTC4217CDHC-12
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC4217CDHC-12#PBF
Manufacturer:
Linear Technology
Quantity:
135
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
12V
Small Footprint
33mΩ MOSFET with R
Wide Operating Voltage Range: 2.9V to 26.5V
Adjustable, 5% Accurate Current Limit
Current and Temperature Monitor Outputs
Overtemperature Protection
Adjustable Current Limit Timer Before Fault
Power Good and Fault Outputs
Adjustable Inrush Current Control
2% Accurate Undervoltage and Overvoltage
Protection
Available in 20-Lead TSSOP and 16-Lead
5mm × 3mm DFN Packages
RAID Systems
Server I/O Cards
Industrial
12V, 1.5A Card Resident Application
0.1µF
RETRY
AUTO
SENSE
V
UV
FLT
TIMER
INTV
LTC4217DHC-12
DD
CC
GND
I
OUT
MON
I
SET
PG
12V
10k
20k
+
330µF
ADC
V
12V
1.5A
4217 TA01a
OUT
DESCRIPTION
The LTC
applications that allows a board to be safely inserted and
removed from a live backplane. The part integrates a Hot
Swap controller, power MOSFET and current sense resistor
in a single package for small form factor applications. A
dedicated 12V version (LTC4217-12) contains preset 12V
specific thresholds, while the standard LTC4217 allows
adjustable thresholds.
The LTC4217 provides separate inrush current control
and a 5% accurate 2A current limit with foldback cur-
rent limiting. The current limit threshold can be adjusted
dynamically using an external pin. Additional features
include a current monitor output that amplifies the sense
resistor voltage for ground referenced current sensing
and a MOSFET temperature monitor output. Thermal limit,
overvoltage, undervoltage and power good monitoring
are also provided.
L, LT, LTC, LTM, Linear Technology and the Linear logo 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.
2A Integrated Hot Swap
®
4217 is an integrated solution for Hot Swap™
0.1A/DIV
10V/DIV
10V/DIV
10V/DIV
V
OUT
V
I
P
IN
IN
G
Power-Up Waveforms
25ms/DIV
Controller
LTC4217
4217 TA01b
4217fd
1

Related parts for LTC4217CDHC-12#PBF

LTC4217CDHC-12#PBF Summary of contents

Page 1

... MOSFET temperature monitor output. Thermal limit, overvoltage, undervoltage and power good monitoring are also provided. L, LT, LTC, LTM, Linear Technology and the Linear logo 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. ...

Page 2

LTC4217 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltage (V ) ................................. –0.3V to 28V DD Input Voltages FB, OV, UV .............................................. –0.3V to 12V TIMER ................................................... –0.3V to 3.5V SENSE .............................V – 10V or – 0. ...

Page 3

... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC4217CDHC-12#PBF LTC4217CDHC-12#TRPBF 421712 LTC4217IDHC-12#PBF LTC4217IDHC-12#TRPBF 421712 LTC4217CDHC#PBF LTC4217CDHC#TRPBF LTC4217IDHC#PBF LTC4217IDHC#TRPBF LTC4217CFE#PBF LTC4217CFE#TRPBF LTC4217IFE#PBF LTC4217IFE#TRPBF LTC4217HFE#PBF LTC4217HFE#TRPBF LEAD BASED FINISH TAPE AND REEL LTC4217CDHC-12 LTC4217CDHC-12#TR LTC4217IDHC-12 LTC4217IDHC-12#TR LTC4217CDHC LTC4217CDHC#TR LTC4217IDHC LTC4217IDHC#TR LTC4217CFE LTC4217CFE#TR LTC4217IFE LTC4217IFE#TR Consult LTC Marketing for parts specified with wider operating temperature ranges ...

Page 4

LTC4217 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER Inputs I OV, UV, FB Pin Input Current IN R OV, UV, FB Pin Input Resistance IN V OV, UV, FB Pin Threshold Voltage TH ∆V OV Pin ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS 2.0 1.8 85°C 1.6 25°C 1.4 –40°C 1.2 1 (V) DD 4217 G01 UV Hysteresis vs Temperature 0.10 0.08 0.06 0.04 –50 – ...

Page 6

LTC4217 TYPICAL PERFORMANCE CHARACTERISTICS and Temperature 3.3V, 12V, 24V –50 – TEMPERATURE (°C) 4217 G10 I vs Temperature and V MON ...

Page 7

PIN FUNCTIONS FB: Foldback and Power Good Input. Connect this pin to an external resistive divider from OUT for the LTC4217 (adjustable) version. The LTC4217-12 version uses a fixed internal divider with optional external adjustment. Open the pin if the ...

Page 8

LTC4217 FUNCTIONAL DIAGRAM INTERNAL 7.5m SENSE RESISTOR V DD – CS +– 1.235V 140k UV * – UV 20k * + 0.62V RST – 224k * + OV OV 20k * – 1.235V ...

Page 9

OPERATION The Functional Diagram displays the main circuits of the device. The LTC4217 is designed to turn a board’s supply voltage on and off in a controlled manner allowing the board to be safely inserted and removed from a live ...

Page 10

LTC4217 APPLICATIONS INFORMATION 12V V DD LTC4217FE R3 140k UV R1 FLT 224k 20k 20k TIMER C T INTV CC 0.1µF C1 GND 0.1µF Figure 1. 0.8A, 12V Card Resident Application After the power-on-reset pulse, the LTC4217 ...

Page 11

APPLICATIONS INFORMATION LTC4217 GATE C P 2.2nF 4217 F03 Figure 3. Compensation for Small C over temperature. Normally the switch is turned off with a 250µA current pulling down the GATE pin to ground. With the switch turned off, the ...

Page 12

LTC4217 APPLICATIONS INFORMATION a resistor between the I pin and ground. As shown in SET the Functional Diagram the voltage at the I the clamp circuit) sets the CS amplifier’s built-in offset voltage. This offset voltage directly determines the active ...

Page 13

APPLICATIONS INFORMATION 12V Fixed Version In the LTC4217-12 the UV, OV and FB pins are driven by internal dividers which may need to be filtered to prevent false faults. By placing a bypass capacitor on these pins the faults are ...

Page 14

LTC4217 APPLICATIONS INFORMATION invoked by tying the TIMER pin to INTV timeout the FLT pin needs to pull-down on the UV pin to restart the power-up sequence. Since the default values for overvoltage, undervoltage and power good thresholds for the ...

Page 15

PACKAGE DESCRIPTION 3.50 ±0.05 1.65 ±0.05 2.20 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC PACKAGE OUTLINE ...

Page 16

LTC4217 PACKAGE DESCRIPTION 6.60 ±0.10 4.50 ±0.10 SEE NOTE 4 RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 0.50 – 0.75 (.0035 – .0079) (.020 – .030) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE ...

Page 17

... Added H-grade to Absolute Maximum Ratings, Order Information, and Electrical Characteristics sections Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 18

... Operates from 1V to 13.5V, Multifunction Current Control, SSOP-16 Operates from 1.7V to 16.5V, Multifunction Current Control, SSOP-20 www.linear.com ● V OUT + 24V 158k 100µF 1.5A 10k 10k ADC 20k 4217 TA02 LT 0111 REV D • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 2008 4217fd ...

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