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參數(shù)資料
| 型號： | LTC1438IG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DIODE ZENER SINGLE 1000mW 11Vz 50mA-Izt 0.05 4uA-Ir 8.2 PowerDI-123 3K/REEL |
| 中文描述： | 2 A DUAL SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-28 |
| 文件頁數(shù)： | 7/32頁 |
| 文件大?。?/td> | 596K |
| 代理商： | LTC1438IG |
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7
LTC1438/LTC1439
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
Auxiliary Regulator
Sink Current Available
Auxiliary Regulator PSRR
AUX DR VOLTAGE (V)
0
0
A
5
10
15
20
2
4
6
8
1438 G19
10
12
14
16
FREQUENCY (kHz)
10
10
20
30
40
50
60
70
P
100
1000
1438 G20
10mA LOAD
100mA LOAD
PI
FU
CTIO
N
S
U
U
V
IN
:
Main Supply Pin. Must be closely decoupled to the
IC’s signal ground pin.
INTV
CC
:
Output of the Internal 5V Regulator and the
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. The INTV
CC
regulator turns off when
both RUN/SS1 and RUN/SS2 are low. Refer to the LTC1538/
LTC1539 for 5V keep-alive applications.
EXTV
CC
:
External Power Input to an Internal Switch. This
switch closes and supplies INTV
CC,
bypassing the internal
low dropout regulator whenever EXTV
CC
is higher than
4.7V. Connect this pin to V
OUT
of the controller with the
higher output voltage. Do not exceed 10V on this pin. See
EXTV
CC
connection in Applications Information section.
BOOST 1, BOOST 2:
Supplies to the Topside Floating
Drivers. The bootstrap capacitors are returned to these
pins. Voltage swing at these pins is from INTV
CC
to
V
IN
+ INTV
CC
.
SW1, SW2:
Switch Node Connections to Inductors. Volt-
age swing at these pins is from a Schottky diode (external)
voltage drop below ground to V
IN
.
SGND:
Small-Signal Ground. Common to both control-
lers, must be routed separately from high current grounds
to the (–) terminals of the C
OUT
capacitors.
PGND:
Driver Power Ground. Connects to sources of
bottom N-channel MOSFETs and the (–) terminals of C
IN
.
SENSE
–
1, SENSE
–
2:
Connects to the (–) input for the
current comparators. Except for the LTC1438-ADJ, SENSE
–
1 is internally connected to the first controller’s V
OUT
sensing point. The first controller can only be used as a
3.3V or 5.0V regulator controlled by the V
PROG1
pin with
the LTC1438, LTC1438X and LTC1439. The LTC1438-ADJ
Controller 1 implements a remote sensing adjustable
regulator. The second controller can be set to a 3.3V, 5.0V
or an adjustable regulator controlled by the V
PROG2
pin
(see Table 1).
Table 1. Output Voltage Table
LTC1438-ADJ
Controller 1
Adjustable Only
LTC1438/LTC1438X
LTC1439
5V or 3.3V Only
Secondary Feedback Loop
Adjustable Only
Remote Sensing
POR2 Output
Controller 2
Adjustable Only
Remote Sensing
POR2 Output
5V/3.3V/Adjustable
Remote Sensing
POR2 Output
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PDF描述 |
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| LTC1438IG-ADJ | DIODE ZENER SINGLE 1000mW 13Vz 50mA-Izt 0.05 2uA-Ir 10 PowerDI-123 3K/REEL |
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| LTC1440IN8 | Ultralow Power Single/Dual Comparator with Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1438IG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-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 |
| LTC1438IG#TR | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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 |
| LTC1438IG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-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 |
| LTC1438IG-ADJ | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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 |
| LTC1438IG-ADJ#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-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 |
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