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LTC1154 Datenblatt(PDF) 11 Page - Linear Technology

Teilenummer LTC1154
Bauteilbeschribung  High-Side Micropower MOSFET Driver
PDF  16 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1154 Datenblatt(HTML) 11 Page - Linear Technology

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11
LTC1154
S
APPLICATI
I FOR ATIO
be added as shown in Figure 8 which holds the supply pin
of the LTC1154 high long enough for the over-current
shutdown circuitry to respond and fully discharge the
gate.
Five volt linear regulators with small output capacitors are
the most difficult to protect as they can “switch” from a
voltage mode to a current limited mode very quickly. The
large output capacitors on many switching regulators may
be able to hold the supply pin of the LTC1154 above 3.5V
sufficiently long that this extra filtering is not required.
Because the LTC1154 is micropower in both the standby
and ON state, the voltage drop across the supply filter is
less than 2mV, and does not significantly alter the accu-
racy of the 100mV drain sense threshold voltage.
High-Side Driver with Thermal Shutdown
High-Side Driver with Over-Voltage Shutdown
S
APPLICATI
TYPICAL
High-Side Driver with Under-Voltage Shutdown
24V to 28V High-Side Switch with Thermal Shutdown
IN
EN
STATUS
†
GND
VS
DS
G
SD
LTC1154
+
100
µF
IRLZ24
6V
LTC1154 • TA03
6V
LOAD
5V
*RL3006-50-100-25-PT0 KEYSTONE
30k
PTC
THERMISTOR
(100°C)*
µP OR
CONTROL
LOGIC
†A 51k pullup resistor should be connected between Status Output and 5V Logic Supply.
IN
EN
STATUS
†
GND
VS
DS
G
SD
LTC1154
+
10
µF
IRLD024
4.75V TO 5.25V
LTC1154 • TA05
5V
LOAD
5V
SWITCH IS SHUTDOWN WHEN VS > 5.7V
µP OR
CONTROL
LOGIC
100
Ω
5.6V
IN
EN
STATUS
†
GND
VS
DS
G
SD
LTC1154
IRLZ24
5V
LTC1154 • TA04
6V
LOAD
5V
µP OR
CONTROL
LOGIC
1
µF**
+
100
µF
10k
1N4148*
2N2907
10k
OPTIONAL IF SUPPLY VOLTAGE LESS THAN 6V.
CAPACITOR CHARGED TO SUPPLY VOLTAGE.
SHUTDOWN OCCURS WHEN SUPPLY VOLTAGE
DROPS BY 0.6V.
*
**
+
IN
EN
STATUS
†
GND
VS
DS
G
SD
LTC1154
MTP12N06
24V TO 28V
LTC1154 • TA06
24V TO 28V
LOAD
5V
*KEYSTONE RL2006-100-100-30-PT.
MOUNT ON MOSFET OR LOAD HEAT SINK
µP OR
CONTROL
LOGIC
10
µF
+
100
µF
3k
18V
PTC
THERMISTOR
(100°C)*
200k
+



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