LT1573-2.5 데이터 시트보기 (PDF) - Linear Technology
부품명
상세내역
제조사
LT1573-2.5 Datasheet PDF : 16 Pages
| |||
LT1573
APPLICATIO S I FOR ATIO
equals the resistance of RB1, RB2, ..., and RBn in parallel,
and the resistance RD equals the resistance of RD1, RD2, ...,
and RDn in parallel.
Voltage Feedback Resistor Divider Table
Voltage feedback resistor divider is provided for conve-
nience for the most possibly used output voltages in
Table 4.
Table 4. LT1573 Output Feedback Divider Resistance
OUTPUT
VOLTAGE (V)
R2 (Ω)
R1 (Ω)
(NEAREST 1%)
1.5
1k
187
1.8
1k
422
2.0
1k
576
2.2
1k
732
2.5
1k
976
2.8
1k
1210
3.0
1k
1370
3.3
1k
1620
3.5
1k
1780
3.8
1k
2000
4.0
1k
2150
4.5
1k
2550
5.0
1k
2940
TYPICAL APPLICATIO S
3.3V/5A Microprocessor Supply
LT1573
FB
COMP
CC
100pF
RC
1k
1/8W
+
CTIME
0.5µF
VIN
5V
LATCH
SHDN
GND
VOUT
VIN
DRIVE
RD
24Ω
1/2W
RB
50Ω
1/8W
QOUT
MOTOROLA
D45H11
CIN +
5V
+
+
COUT1
COUT2
R1
1.6k
1/8W
R2
1k
1/8W
COUT1 = 24 × 1µF SURFACE MOUNT CERAMIC CAPACITOR
(FOR T < 45°C, COUT1 = 24 × 1µF Y5V CERAMIC SURFACE MOUNT CAPACITORS,
FOR T > 45°C, COUT1 = 24 × 1µF X7R CERAMIC SURFACE MOUNT CAPACITORS)
PLACE COUT1 IN THE MICROPROCESSOR SOCKET CAVITY
CIN, COUT2 = 220µF SURFACE MOUNT TANTALUM CAPACITOR
CTIME = 0.5µF FOR 100ms TIME OUT AT ROOM TEMPERATURE
SHDN (ACTIVE HIGH) PIN SHOULD BE TIED TO GROUND IF IT IS NOT USED
VOUT
3.3V
LOAD
GND
1573 TA01
13
Share Link: 