LT1572 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Lista de partido
LT1572 Datasheet PDF : 12 Pages
| |||
TYPICAL PERFOR A CE CHARACTERISTICS
LT1572
Supply Current vs Supply Voltage
(Shutdown Mode)
160
TJ = 25°C
140
120
100
80
VC = 50mV
60
40
20
0
0
VC = 0V
10
20
30
SUPPLY VOLTAGE (V)
40
1572 G07
Driver Current* vs Switch Current
40
35
30
25
TJ = – 55°C
20
15
TJ = ≥ 25°C
10
5
0
0 0.25 0.50 0.75 1.00 1.25
SWITCH CURRENT (A)
1572 G08
* AVERAGE POWER SUPPLY CURRENT IS
FOUND BY MULTIPLYING DRIVER CURRENT BY
DUTY CYCLE, THEN ADDING QUIESCENT CURRENT.
Supply Current vs Input Voltage*
15
14 TJ = 25°C
13 NOTE THAT THIS CURRENT DOES NOT
INCLUDE DRIVER CURRENT, WHICH IS
12 A FUNCTION OF LOAD CURRENT AND
DUTY CYCLE.
11
10
90% DUTY CYCLE
9
50% DUTY CYCLE
8
7
10% DUTY CYCLE
6
0% DUTY CYCLE
5
0 10 20 30 40 50 60
INPUT VOLTAGE (V)
1572 G09
* UNDER VERY LOW OUTPUT CURRENT CONDITIONS,
DUTY CYCLE FOR MOST CIRCUITS WILL APPROACH
10% OR LESS.
Shutdown Mode Supply Current
200
180
160
140
120
TJ = 150°C
100
80
60
–55°C ≤ TJ ≤ 125°C
40
20
0
0 10 20 30 40 50 60 70 80 90 100
VC PIN VOLTAGE (mV)
1572 G10
Idle Supply Current
vs Temperature
11
10 VC = 0.6V
9
8
7
VSUPPLY = 60V
6
VSUPPLY = 3V
5
4
3
2
1
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1572 G13
Error Amplifier Transconductance
5000
4500
4000
gm
=
∆I
∆V
(VC
(FB
PIN)
PIN)
3500
3000
2500
2000
1500
1000
500
0
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
1572 G11
Feedback Pin Clamp Voltage
500
450
400
350
–55°C
300
25°C
250
150°C
200
150
100
50
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
FEEDBACK CURRENT (mA)
1572 G14
VC Pin Characteristics
300
200 VFB = 1.5V (CURRENT INTO VC PIN)
100
0
–100
TJ = 25°C
–200
–300
VFB = 0.8V (CURRENT OUT OF VC PIN)
–400
0
0.5 1.0 1.5 2.0 2.5
VC PIN VOLTAGE (V)
1572 G12
Switch “Off” Characteristics
1000
900
800
700
600
500 VSUPPLY
= 3V
400
300
VSUPPLY VSUPPLY
= 15V = 40V
200
100
0
0 10 20 30 40 50 60 70 80 90 100
SWITCH VOLTAGE (V)
1572 G15
5
Share Link: 