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參數(shù)資料
| 型號： | LT3740EDHC |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.14 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 5 X 3 MM, PLASTIC, MO-229WJED-1, DFN-16 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 234K |
| 代理商： | LT3740EDHC |
LT3740
5
3740fc
Error Amplier Transconductance
vs Temperature
BIAS-VIN to Enable Controller
vs Temperature
Undervoltage Lockout Threshold
vs Temperature
PIN FUNCTIONS
SN– (Pin 1): Negative Current Sensing Pin. Connect this
pin to the source of the bottom MOSFET for No RSENSE
or to a current sense resistor.
PGND (Pin 2): Power Ground. Connect this pin closely to
the source of the bottom N-channel MOSFET.
BGATE (Pin 3): Bottom Gate Drive. Drives the gate of the
bottom N-channel MOSFET.
BGDP (Pin 4): Bottom Gate Drive Power Supply. Connect
this pin to a voltage source higher than 7V (VIN or BIAS).
SN+ (Pin 5):
Positive Current Sensing Pin. Connect this
pin to the drain of the bottom MOSFET for No RSENSE or
to a current sense resistor.
SW (Pin 6): Switch Node. Connect this pin to the source
of the top N-channel MOSFET and the drain of the bottom
N-channel MOSFET.
TGATE (Pin 7): Top Gate Drive. Drives the gate of the top
N-channel MOSFET to BIAS.
BIAS (Pin 8): Top Gate Drive Power Supply. Connect a
capacitor between this pin and VIN.
SWB (Pin 9): Switch Pin of the Internal Boost. Connect
the boost inductor here.
VIN (Pin 10): Input Supply Pin. Must be locally bypassed
with a capacitor.
RANGE (Pin 11): Current Limit Range Select Pin. Ground
this pin for 50mV current sense voltage limit. Leave this
pin open for 80mV current sense voltage limit. Connect
this pin to VIN for current sense voltage limit of 105mV.
PGOOD (Pin 12): Power Good Output. Open collector
logic output that is pulled low when the FB voltage lower
than 720mV.
SHDN(Pin13):ShutdownPin.Connectto2.5Vorhigherto
enable device; 0.5V or less to disable device. Also, this pin
functions as soft-start when a voltage ramp is applied.
XREF (Pin 14): External Reference Pin. This pin sets the
FB voltage externally between 0V and 0.8V. It can be used
to slave the output voltage during normal operation or the
output start-up behavior to an external signal source. Tie
this pin to 1V or higher to use the internal 0.8V reference.
FB (Pin 15): Feedback Pin. Pin voltage is regulated to 0.8V
if internal reference is used or to the XREF pin if voltage
is between 0V and 0.8V. Connect the feedback resistor
divider to this pin.
TEMPERATURE (°C)
–50
ERROR
AMP
(μs)
340
390
370
380
350
360
400
3740 G12
330
320
310
300
25
50
0
–25
75
100
TEMPERATURE (°C)
–50
BIAS-V
IN
(V)
7.20
7.45
7.35
7.40
7.25
7.30
7.50
3740 G13
7.15
7.10
7.05
7.00
25
50
0
–25
75
100
TEMPERATURE (°C)
–50
UNDER
VOL
TAGE
LOCKOUT
V
IN
(V)
2.0
2.5
1.5
3.0
3740 G14
1.0
0.5
0
25
50
0
–25
75
100
TYPICAL PERFORMANCE CHARACTERISTICS (T
A = 25°C, unless otherwise noted)
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相關(guān)代理商/技術(shù)參數(shù) |
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| LT3740EDHC#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN 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)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LT3740EDHC#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN 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) |
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| LT3740EDHC-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide Operating Range, Valley Mode, No RSENSE? Synchronous Step-Down Controller |
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