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Linear Technology Electronic Components Datasheet

LTC4213CDDB Datasheet

Electronic Circuit Breaker

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FEATURES
Fast 1µs Response Circuit Breaker
3 Selectable Circuit Breaker Thresholds
No Sense Resistor Required
Dual Level Overcurrent Fault Protection
Controls Load Voltages from 0V to 6V
High Side Drive for External N-Channel FET
Undervoltage Lockout
READY Pin Signals When Circuit Breaker Armed
Small Plastic (3mm x 2mm) DFN Package
U
APPLICATIO S
Electronic Circuit Breaker
High-Side Switch
Hot Board Insertion
TYPICAL APPLICATIO
1.25V Electronic Circuit Breaker
VIN
1.25V
SI4864DY
VOUT
1.25V
3.5A
VBIAS
2.3V TO 6V
OFF ON
SENSEP GATE SENSEN
VCC
LTC4213
VBIAS
10k
ON
GND ISEL READY
4213 TA01
LTC4213
No RSENSE
Electronic Circuit Breaker
DESCRIPTIO
The LTC®4213 is an Electronic Circuit Breaker. An over-
current circuit breaker senses the voltage across the drain
and source terminals of an external N-channel MOSFET
with no need for a sense resistor. The advantages are a
lower cost and reduced voltage and power loss in the
switch path. An internal high-side driver controls the
external MOSFET gate.
Two integrated comparators provide dual level over-
current protection over the bias supply to ground common
mode range. The slow comparator has 16µs response
while the fast comparator trips in 1µs. The circuit breaker
has three selectable trip thresholds: 25mV, 50mV and
100mV. An ON pin controls the ON/OFF and resets circuit
breaker faults. READY signals the MOSFET is conducting
and the circuit breaker is armed. The LTC4213 operates
from VCC = 2.3V to 6V.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Severe Overload Response
IOUT
(50A/DIV)
VOUT
(1V/DIV)
VGATE
(5V/DIV)
VIN
(1V/DIV)
2µs/DIV
4213 TA01b
4213f
1


Linear Technology Electronic Components Datasheet

LTC4213CDDB Datasheet

Electronic Circuit Breaker

No Preview Available !

LTC4213 www.DataSheet4U.com
ABSOLUTE AXI U RATI GS
(Note 1)
Bias Supply Voltage (VCC) ........................... –0.3V to 9V
Input Voltages
ON, SENSEP, SENSEN .............................– 0.3V to 9V
ISEL .......................................... – 0.3V to (VCC + 0.3V)
Output Voltages
GATE .....................................................– 0.3V to 15V
READY .....................................................– 0.3V to 9V
Operating Temperature Range
LTC4213C ............................................... 0°C to 70°C
LTC4213I ............................................. –40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10sec)................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
READY 1
8 VCC
ON 2
7 SENSEP
9
ISEL 3
6 SENSEN
GND 4
5 GATE
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 250°C/W
EXPOSED PAD (PIN 9)
PCB CONNECTION OPTIONAL
ORDER PART
NUMBER
LTC4213CDDB
LTC4213IDDB
DDB PART*
MARKING
LBHV
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, ISEL = 0 unless otherwise noted. (Note 2)
SYMBOL
VCC
VSENSEP
ICC
VCC(UVLR)
VCC(UVHYST)
ISENSEP
ISENSEN
VCB
VCB(FAST)
IGATE(UP)
IGATE(DN)
VGSMAX
VGSARM
PARAMETER
Bias Supply Voltage
SENSEP Voltage
VCC Supply Current
VCC Undervoltage Lockout Release
VCC Undervoltage Lockout Hysteresis
SENSEP Input Current
SENSEN Input Current
Circuit Breaker Trip Voltage
VCB = VSENSEP – VSENSEN
Fast Circuit Breaker Trip Voltage
VCB(FAST) = VSENSEP – VSENSEN
GATE Pin Pull Up Current
GATE Pin Pull Down Current
External N-Channel Gate Drive
VGS Voltage to Arm Circuit Breaker
CONDITIONS
VCC Rising
VSENSEP = VSENSEN = 5V, Normal Mode
VSENSEP = VSENSEN = 0, Normal Mode
VSENSEP = VSENSEN = 5V, Normal Mode
VSENSEP = VSENSEN = 0, Normal Mode
VSENSEP = VSENSEN = 5V,
Reset Mode or Fault Mode
ISEL = 0, VSENSEP = VCC
ISEL = Floated, VSENSEP = VCC
ISEL = VCC, VSENSEP = VCC
ISEL = 0, VSENSEP = VCC
ISEL = Floated, VSENSEP = VCC
ISEL = VCC, VSENSEP = VCC
VGATE = 0V
VSENSEP – VSENSEN = 200mV, VGATE = 8V
VSENSEN = 0, VCC 2.97V, IGATE = –1µA
VSENSEN = 0, VCC = 2.3V, IGATE = –1µA
VSENSEN = 0, VCC 2.97V
VSENSEN = 0, VCC = 2.3V
MIN
2.3
0
1.8
30
15
15
50
22.5
45
90
63
126
252
–50
10
4.8
2.65
4.4
2.5
TYP
1.6
2.07
100
40
–1
40
–1
280
25
50
100
100
175
325
–100
40
6.5
4.3
5.4
3.5
MAX UNITS
6
V
6
V
3
mA
2.23
V
160
mV
80
µA
±15
µA
80
µA
±15
µA
µA
27.5
mV
55
mV
110
mV
115
mV
200
mV
371
mV
–150
µA
mA
8
V
8
V
7.6
V
7
V
4213f
2


Part Number LTC4213CDDB
Description Electronic Circuit Breaker
Maker Linear
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