LTC2954ITS8-1 データシートの表示（PDF） - Linear Technology
部品番号
コンポーネント説明
メーカー
LTC2954ITS8-1 Datasheet PDF : 18 Pages
| |||
LTC2954
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: The KILL turn-on blanking timer period is the waiting period
immediately after the enable output is asserted. This blanking time allows
sufficient time for the DC/DC converter and the μP to perform power-up
tasks. The KILL and PB inputs are ignored during this period. If KILL
remains low at the end of this time period, the enable output is released,
thus turning off system power. This time delay does not include tDB,ON
or tONT.
Note 4: To manually force an immediate release of the EN/EN pin, the
pushbutton input must be held low for at least tPD,MIN (internal default
power-down timer) + tPDT (adjustable by placing external capacitor at
PDT pin).
Note 5: The enable lockout time is designed to allow an application to
properly power-down such that the next power-up sequence starts from a
consistent powered-down configuration. PB is ignored during this lockout
time. This time delay does not include tDB,ON or tONT.
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature
10
VIN = 26.4V
8
6
VIN = 3.3V
VIN = 2.7V
4
2
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
2954 G01
Turn-On Debounce Time (tDB, ON +
tONT) vs ONT External Capacitance
10000
TA = 25°C
VIN = 3.3V
1000
100
Supply Current vs Supply Voltage
15
12
T = 25°C
T = 85°C
9
T = –40°C
6
3
0
0 5 10 15 20 25 30 35
VIN (V)
2954 G02
ONT Pull-Up Current
vs Temperature
–3.4
–3.2
VIN = 26.4V
–3.0
VIN = 2.7V
–2.8
10
1
10
100
1000
ONT EXTERNAL CAPACITANCE (nF)
2954 G04
–2.6
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
2954 G05
4
Internal Default Turn-On
Debounce Time (tDB, ON) vs VIN
50
TA = 25°C
40
30
20
10
0
0 5 10 15 20 25 30
VIN (V)
2954 G03
Turn-Off Debounce Time (tDB, OFF)
vs VIN
50
TA = 25°C
40
30
20
10
0
0 5 10 15 20 25 30
VIN (V)
2954 G06
2954fb
Share Link: 