參數(shù)資料
型號: LT1317B
廠商: Linear Technology Corporation
英文描述: 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-PDIP 0 to 70
中文描述: 微功耗,600kHz的PWM型DC / DC轉(zhuǎn)換器
文件頁數(shù): 6/16頁
文件大小: 447K
代理商: LT1317B
6
LT1317/LT1317B
TYPICAL PERFOR U
Load Regulation (LT1317)
V
IN
= 1.5V
V
OUT
= 5V
I
LOAD
25mA/DIV
1317 TPC19
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
Load Regulation (LT1317)
V
IN
= 2V
V
OUT
= 5V
I
LOAD
25mA/DIV
1317 TPC20
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
Load Regulation (LT1317)
V
IN
= 2.5V
V
OUT
= 5V
I
LOAD
50mA/DIV
1317 TPC21
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
Load Regulation (LT1317)
V
IN
= 1.5V
V
OUT
= 3.3V
I
LOAD
25mA/DIV
1317 TPC22
Load Regulation (LT1317)
V
IN
= 2V
V
OUT
= 3.3V
I
LOAD
50mA/DIV
1317 TPC23
Load Regulation (LT1317)
V
IN
= 2.5V
V
OUT
= 3.3V
I
LOAD
50mA/DIV
1317 TPC24
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
V
OUT
50mV/DIV
DC COUPLED
OFFSET
ADDED
Note:
For load regulation pictures, double lines are due to
output capacitor ESR.
V
C
(Pin 1):
Compensation Pin for Error Amplifier. Con-
nect a series RC network from this pin to ground. Typical
values for compensation are a 33k/3.3nF combination. A
100pF capacitor from the V
C
pin to ground is optional and
improves noise immunity. Minimize trace area at V
C
.
FB (Pin 2):
Feedback Pin. Reference voltage is 1.24V.
Connect resistor divider tap here. Minimize trace area at
FB. Set V
OUT
according to: V
OUT
= 1.24V(1 + R1/R2).
SHDN (Pin 3):
Shutdown. Pull this pin low for shutdown
mode (only the low-battery detector remains active).
Leave this pin floating or tie to a voltage between 1.4V and
6V to enable the device. SHDN pin is logic level and need
only meet the logic specification (1.4V for high, 0.4V for
low).
PI
FU
CTIO
N
S
U
U
GND (Pin 4):
Ground. Connect directly to local ground
plane.
SW (Pin 5):
Switch Pin. Connect inductor/diode here.
Minimize trace area at this pin to keep EMI down.
V
IN
(Pin 6):
Supply Pin. Must be bypassed close to the
pin.
LBI (Pin 7):
Low-Battery Detector Input. 200mV refer-
ence. Voltage on LBI must stay between ground and
700mV. Low-battery detector remains active in shutdown
mode.
LBO (Pin 8):
Low-Battery Detector Output. Open collec-
tor, can sink 10
μ
A. A 1M
pull-up is recommended.
相關(guān)PDF資料
PDF描述
LT1317BCS8 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-SO 0 to 70
LT1317CMS8 8-Bit Identity/Magnitude Comparators (P=Q) with Enable 20-SO 0 to 70
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