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參數(shù)資料
| 型號(hào)： | LTC1735IS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 3 A SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁(yè)數(shù)： | 7/32頁(yè) |
| 文件大小： | 373K |
| 代理商： | LTC1735IS |
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7
LTC1735
C
OSC
(Pin 1):
External capacitor C
OSC
from this pin to
ground sets the operating frequency.
RUN/SS (Pin 2):
Combination of Soft-Start and Run
Control Inputs. A capacitor to ground at this pin sets the
ramp time to full output current. The time is approximately
1.25s/
μ
F. Forcing this pin below 1.5V causes the device to
be shutdown. In shutdown all functions are disabled.
Latchoff overcurrent protection is also invoked via this pin
as described in the Applications Information section.
I
TH
(Pin 3):
Error Amplifier Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is 0V to 2.4V.
FCB (Pin 4):
Forced Continuous/Synchronization Input.
Tie this pin to ground for continuous synchronous opera-
tion, to a resistive divider from the secondary output when
using a secondary winding or to INTV
CC
to enable Burst
Mode operation at low load currents. Clocking this pin with
a signal above 1.5V
P–P
disables Burst Mode operation but
allows cycle-skipping at low load currents and synchro-
nizes the internal oscillator with the external clock.
SGND (Pin 5):
Small-Signal Ground. All small-signal
components such as C
OSC
, C
SS
, the feedback divider plus
the loop compensation resistors and capacitor(s) should
single-point tie to this pin. This pin should, in turn, connect
to PGND.
V
OSENSE
(Pin 6):
Receives the feedback voltage from an
external resistive divider across the output.
SENSE
–
(Pin 7):
The (–) Input to the Current Comparator.
SENSE
+
(Pin 8):
The (+) Input to the Current Comparator.
Built-in offsets between SENSE
–
and SENSE
+
pins in
conjunction with R
SENSE
set the current trip threshold.
EXTV
CC
(Pin 9):
Input to the Internal Switch Connected to
INTV
CC
. This switch closes and supplies V
CC
power when-
ever EXTV
CC
is higher than 4.7V. See EXTV
CC
connection
in the Applications Information section. Do not exceed 7V
on this pin and ensure EXTV
CC
≤
V
IN
.
PGND (Pin 10):
Driver Power Ground. Connects to the
source of bottom N-channel MOSFET, the anode of the
Schottky diode, and the (–) terminal of C
IN
.
BG (Pin 11):
High Current Gate Drive for Bottom
N-Channel MOSFET. Voltage swing at this pin is from
ground to INTV
CC
.
INTV
CC
(Pin 12):
Output of the Internal 5.2V Regulator and
EXTV
CC
Switch. The driver and control circuits are pow-
ered from this voltage. Decouple to power ground with a
1
μ
F ceramic capacitor placed directly adjacent to the IC
together with a minimum of 4.7
μ
F tantalum or other low
ESR capacitor.
V
IN
(Pin 13):
Main Supply Pin. Must be closely decoupled
to power ground.
SW (Pin 14):
Switch Node Connection to Inductor and
Bootstrap Capacitor. Voltage swing at this pin is from a
Schottky diode (external) voltage drop below ground to
V
IN
.
BOOST (Pin 15):
Supply to Topside Floating Driver. The
bootstrap capacitor is returned to this pin. Voltage swing
at this pin is from a diode drop below INTV
CC
to (V
IN
+
INTV
CC
).
TG (Pin 16):
High Current Gate Drive for Top N-Channel
MOSFET. This is the output of a floating driver with a
voltage swing equal to INTV
CC
superimposed on the
switch node voltage SW.
PU
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| LTC1735IS-1 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC1735-1 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
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| LTC1735IS#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC1735IS#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC1735IS#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC1735IS-1 | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
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