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參數(shù)資料
| 型號： | LTC1435IG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Low Noise Synchronous Step-Down Switching Regulator |
| 中文描述： | 2 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 404K |
| 代理商： | LTC1435IG |
5
LTC1435
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
Soft Start: Load Current vs Time
Burst Mode Operation
PI
FU
CTIO
N
S
U
U
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 current output. The time is approximately
0.5s/
μ
F. Forcing this pin below 1.3V causes the device to
be shut down. In shutdown all functions are disabled.
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 2.5V.
SFB (Pin 4):
Secondary Winding Feedback Input. Nor-
mally connected to a feedback resistive divider from the
secondary winding. This pin should be tied to: ground to
force continuous operation; INTV
CC
in applications that
don’t use a secondary winding; and a resistive divider from
the output in applications using a secondary winding.
SGND (Pin 5):
Small-Signal Ground. Must be routed
separately from other grounds to the (–) terminal of C
OUT
.
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 thresholds.
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 Applications Information section. Do not exceed 10V on
this pin. Connect to V
OUT
if V
OUT
≥
5V.
PGND (Pin 10):
Driver Power Ground. Connects to source
of bottom N-channel MOSFET 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 5V Regulator and
EXTV
CC
Switch. The driver and control circuits are pow-
ered from this voltage. Must be closely decoupled to power
ground with a minimum of 2.2
μ
F tantalum or electrolytic
capacitor.
V
IN
(Pin 13):
Main Supply Pin. Must be closely decoupled
to the IC’s signal ground pin.
SW (Pin 14):
Switch Node Connection to Inductor. Volt-
age 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 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.
I
LOAD
= 50mA
1435 G16
V
20mV/DIV
V
200mV/DIV
1435 G17
RUN/SS
5V/DIV
INDUCTOR
CURRENT
1A/DIV
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1435IG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
| LTC1435IG#TR | 制造商:Linear Technology 功能描述:DP-SWREG/Controller, See P/N LTC1435IG#TR for Upgrade/ |
| LTC1435IG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1435IS | 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:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1435IS#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:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 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:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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