LTC4213
No R
SENSE
™
Electronic Circuit Breaker
FEATURES
■
■
■
■
■
■
■
■
■
DESCRIPTIO
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
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 V
CC
= 2.3V to 6V.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
APPLICATIO S
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Electronic Circuit Breaker
High-Side Switch
Hot Board Insertion
TYPICAL APPLICATIO
SI4864DY
1.25V Electronic Circuit Breaker
V
IN
1.25V
V
OUT
1.25V
3.5A
Severe Overload Response
I
OUT
(50A/DIV)
V
BIAS
2.3V TO 6V
V
CC
SENSEP GATE SENSEN
V
BIAS
LTC4213
10k
READY
V
OUT
(1V/DIV)
OFF ON
ON
GND
I
SEL
V
GATE
(5V/DIV)
4213 TA01
V
IN
(1V/DIV)
U
2µs/DIV
4213 TA01b
U
U
4213f
1
LTC4213
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
READY 1
ON 2
I
SEL
3
GND 4
9
8 V
CC
7 SENSEP
6 SENSEN
5 GATE
Bias Supply Voltage (V
CC
) ........................... –0.3V to 9V
Input Voltages
ON, SENSEP, SENSEN .............................– 0.3V to 9V
I
SEL
.......................................... – 0.3V to (V
CC
+ 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
ORDER PART
NUMBER
LTC4213CDDB
LTC4213IDDB
DDB PART*
MARKING
LBHV
DDB PACKAGE
8-LEAD (3mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 250°C/W
EXPOSED PAD (PIN 9)
PCB CONNECTION OPTIONAL
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, I
SEL
= 0 unless otherwise noted. (Note 2)
SYMBOL
V
CC
V
SENSEP
I
CC
V
CC(UVLR)
∆V
CC(UVHYST)
I
SENSEP
I
SENSEN
PARAMETER
Bias Supply Voltage
SENSEP Voltage
V
CC
Supply Current
V
CC
Undervoltage Lockout Release
V
CC
Undervoltage Lockout Hysteresis
SENSEP Input Current
SENSEN Input Current
V
SENSEP
= V
SENSEN
= 5V, Normal Mode
V
SENSEP
= V
SENSEN
= 0, Normal Mode
V
SENSEP
= V
SENSEN
= 5V, Normal Mode
V
SENSEP
= V
SENSEN
= 0, Normal Mode
V
SENSEP
= V
SENSEN
= 5V,
Reset Mode or Fault Mode
V
CB
Circuit Breaker Trip Voltage
V
CB
= V
SENSEP
– V
SENSEN
Fast Circuit Breaker Trip Voltage
V
CB(FAST)
= V
SENSEP
– V
SENSEN
GATE Pin Pull Up Current
GATE Pin Pull Down Current
External N-Channel Gate Drive
V
GS
Voltage to Arm Circuit Breaker
I
SEL
= 0, V
SENSEP
= V
CC
I
SEL
= Floated, V
SENSEP
= V
CC
I
SEL
= V
CC,
V
SENSEP
= V
CC
I
SEL
= 0, V
SENSEP
= V
CC
I
SEL
= Floated, V
SENSEP
= V
CC
I
SEL
= V
CC,
V
SENSEP
= V
CC
V
GATE
= 0V
∆V
SENSEP
– V
SENSEN
= 200mV, V
GATE
= 8V
V
SENSEN
= 0, V
CC
≥
2.97V, I
GATE
= –1µA
V
SENSEN
= 0, V
CC
= 2.3V, I
GATE
= –1µA
V
SENSEN
= 0, V
CC
≥
2.97V
V
SENSEN
= 0, V
CC
= 2.3V
●
●
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
●
●
●
MIN
2.3
0
TYP
MAX
6
6
UNITS
V
V
mA
V
mV
µA
µA
µA
µA
µA
1.6
1.8
30
15
15
50
22.5
45
90
63
126
252
–50
10
4.8
2.65
4.4
2.5
2.07
100
40
–1
40
–1
280
25
50
100
100
175
325
–100
40
6.5
4.3
5.4
3.5
3
2.23
160
80
±15
80
±15
V
CC
Rising
●
●
27.5
55
110
115
200
371
–150
8
8
7.6
7
V
CB(FAST)
I
GATE(UP)
I
GATE(DN)
∆V
GSMAX
∆V
GSARM
2
U
mV
mV
mV
mV
mV
mV
µA
mA
V
V
V
V
4213f
W
U
U
W W
W
LTC4213
ELECTRICAL CHARACTERISTICS
SYMBOL
∆V
GSMAX
–
∆V
GSARM
V
READY(OL)
I
READY(LEAK)
V
ON(TH)
∆V
ON(HYST)
V
ON(RST)
I
ON(IN)
∆V
OV
t
OV
t
FAULT(SLOW)
t
FAULT(FAST)
t
DEBOUNCE
t
READY
t
OFF
t
ON
t
RESET
PARAMETER
Difference Between
∆V
GSMAX
and
∆V
GSARM
READY Pin Output Low Voltage
READY Pin Leakage Current
ON Pin High Threshold
ON Pin Hysteresis
ON Pin Reset Threshold
ON Pin Input Current
Overvoltage Threshold
∆V
OV
= V
SENSEP
– V
CC
Overvoltage Protection Trip Time
V
CB
Trips to GATE Discharging
V
CB(FAST)
Trips to GATE Discharging
Startup De-Bounce Time
READY Delay Time
Turn-Off Time
Turn-On Time
Reset Time
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, I
SEL
= 0 unless otherwise noted. (Note 2)
CONDITIONS
V
SENSEN
= 0, V
CC
≥
2.97V
V
SENSEN
= 0, V
CC
= 2.3V
I
READY
= 1.6mA, Pull Down Device On
V
READY
= 5V, Pull Down Device Off
ON Rising, GATE Pulls Up
ON Falling, GATE Pulls Down
ON Falling, Fault Reset, GATE Pull Down
V
ON
= 1.2V
●
●
●
●
●
●
●
●
MIN
0.3
0.15
TYP
1.1
0.8
0.2
0
MAX
UNITS
V
V
0.4
±1
0.84
90
0.44
±1
1.1
160
27
2.5
130
115
10
16
150
V
µA
V
mV
V
µA
V
µs
µs
µs
µs
µs
µs
µs
µs
0.76
10
0.36
0.41
25
0.8
40
0.4
0
0.7
65
16
1
V
SENSEP
= V
SENSEN
= Step 5V to 6.2V
∆V
SENSE
Step 0mV to 50mV,
V
SENSEN
Falling, V
CC
= V
SENSEP
= 5V
∆V
SENSE
Step 0V to 0.3V, V
SENSEN
Falling,
V
SENSEP
= 5V
V
ON
= 0V to 2V Step to Gate Rising,
(Exiting Reset Mode)
V
GATE
= 0V to 8V Step to READY Rising,
V
SENSEP
= V
SENSEN
= 0
V
ON
= 2V to 0.6V Step to GATE Discharging
V
ON
= 0.6V to 2V Step to GATE Rising,
(Normal Mode)
V
ON
Step 2V to 0V
●
●
7
27
22
1.5
4
20
60
50
5
8
80
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
4213f
3
LTC4213
unless otherwise noted.
I
CC
vs V
CC
3.0
2.5
2.0
1.5
1.0
0.5
0
2.0
3.0
2.5
2.0
1.5
1.0
0.5
0
–50
TYPICAL PERFOR A CE CHARACTERISTICS
I
CC
vs Temperature
UNDERVOLTAGE LOCKOUT THRESHOLD (V)
BIAS SUPPLY CURRENT (mA)
BIAS SUPPLY CURRENT (mA)
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
Normalized V
CB
vs V
CC
1.06
1.04
NORMALIZED V
CB
1.02
1.00
0.98
0.96
0.94
2.0
1.02
1.00
0.98
0.96
0.94
–50
NORMALIZED V
CB(FAST)
NORMALIZED V
CB
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
Normalized V
CB(FAST)
vs
Temperature
1.06
1.04
NORMALIZED V
CB(FAST)
1.00
0.98
0.96
0.94
–50
I
GATE(UP)
(µA)
100
I
GATE(UP)
(µA)
1.02
–25
75
0
50
25
TEMPERATURE (°C)
4
U W
5.5
6.0
4213 G01
Specifications are at T
A
= 25°C. V
CC
= 5V
V
CC(UVLR)
vs Temperature
2.3
2.2
2.1
V
CC
RISING
2.0
1.9
1.8
1.7
–50
V
CC
FALLING
–25
75
25
0
50
TEMPERATURE (°C)
100
125
–25
75
0
50
25
TEMPERATURE (°C)
100
125
4213 G02
4213 G03
Normalized V
CB
vs Temperature
1.06
1.04
1.06
1.04
1.02
1.00
0.98
0.96
Normalized V
CB(FAST)
vs V
CC
5.5
6.0
–25
75
0
50
25
TEMPERATURE (°C)
100
125
0.94
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
5.5
6.0
4213 G04
4213 G05
4213 G06
I
GATE(UP)
vs V
CC
104
104
I
GATE(UP)
vs Temperature
102
102
100
98
98
100
125
96
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
5.5
6.0
96
–50
–25
75
0
25
50
TEMPERATURE (°C)
100
125
4213 G07
4213 G08
4213 G09
4213f
LTC4213
unless otherwise noted.
TYPICAL PERFOR A CE CHARACTERISTICS
∆V
GSMAX
and
∆V
GSARM
vs V
CC
8
∆V
GSMAX
8
∆V
GSMAX
(FOR 5V
CC
)
∆V
GSMAX
AND
∆V
GSARM
(V)
∆V
GSMAX
AND
∆V
GSARM
(V)
7
∆V
GSARM
∆V
GSARM
(FOR 5V
CC
)
6
∆V
GSMAX
(FOR 2.5V
CC
)
∆V
GSARM
(FOR 2.5V
CC
)
4
ON PIN THRESHOLD (V)
6
5
4
3
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
V
ON(TH)
vs Temperature
0.90
OVERVOLTAGE THRESHOLD (V)
0.85
ON PIN THRESHOLD (V)
0.72
OVERVOLTAGE THRESHOLD (V)
HIGH THRESHOLD
0.80
LOW THRESHOLD
0.75
0.70
0.65
–50
–25
75
0
50
25
TEMPERATURE (°C)
t
DEBOUNCE
and t
READY
vs V
CC
100
100
t
DEBOUNCE
AND t
READY
(µs)
t
DEBOUNCE
AND t
READY
(µs)
80
t
DEBOUNCE
t
READY
60
60
t
RESET
(µs)
40
20
0
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
U W
5.5
4213 G10
Specifications are at T
A
= 25°C. V
CC
= 5V
∆V
GSMAX
and
∆V
GSARM
vs
Temperature
0.90
V
ON(TH)
vs V
CC
7
0.85
HIGH THRESHOLD
0.80
LOW THRESHOLD
0.75
5
0.70
6.0
3
–50
–25
75
0
25
50
TEMPERATURE (°C)
100
125
0.65
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
5.5
6.0
4213 G11
4213 G12
∆V
OV
vs V
CC
0.74
1.0
0.9
0.8
0.7
0.6
0.5
∆V
OV
vs Temperature
0.70
0.68
100
125
0.66
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
5.5
6.0
0.4
–50
–25
75
0
25
50
TEMPERATURE (°C)
100
125
4213 G13
4213 G14
4213 G15
t
DEBOUNCE
and t
READY
vs
Temperature
120
100
80
60
40
20
20
t
RESET
vs V
CC
80
t
DEBOUNCE
40
t
READY
5.5
6.0
0
–50
–25
75
0
50
25
TEMPERATURE (°C)
100
125
0
2.0
2.5
3.0 3.5 4.0 4.5 5.0
BIAS SUPPLY VOLTAGE (V)
5.5
6.0
4213 G16
4213 G17
4213 G18
4213f
5
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