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參數(shù)資料
| 型號： | LTC3770 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Synchronous Controller with Margining, Tracking and PLL |
| 中文描述： | 同步控制器裕，跟蹤和PLL |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LTC3770 |
7
LTC3770
3770f
V
FB
(V)
0
0
M160
0.1
0.2
0.3
0.4
3770 G21
0.5
0.6
80
60
40
140
120
20
100
V
RNG
= 1V
TYPICAL PERFOR AU
PIU
V
RNG
(Pin 1/Pin 4):
Sense Voltage Range Input. The
voltage at this pin is ten times the nominal sense voltage
at maximum output current and can be set from 0.5V to 2V
by a resistive divider from INTV
CC
. The nominal sense
voltage defaults to 50mV when this pin is tied to ground,
200mV when tied to INTV
CC
. Do not set this voltage
between 0.5V to ground or 2V to INTV
CC
.
V
FB
(Pin 2/Pin 5):
Error Amplifier Feedback Input. This pin
connects the error amplifier input to an external resistive
divider from V
OUT
.
I
TH
(Pin 3/Pin 6):
Current Control Threshold and Error
Amplifier Compensation Point. The current comparator
threshold increases with this control voltage. The voltage
ranges from 0V to 2.4V with 0.75V corresponding to zero
sense voltage (zero current). There is an integrated ca-
pacitor of 20pF connected to this pin.
SGND (Pin 4/Pin 7):
Signal Ground. All small-signal
components and compensation components should con-
nect to this ground, which in turn connects to PGND at one
point.
MARGIN1 (Pin 5/Pin 8):
The MSB Logic Input for the
Margining Function. Together with the MARGIN0 pin
determines whether the IC is in margin high, margin low,
or no margin state. This pin has a 50k internal pull-down
resistor.
MARGIN0 (Pin 6/Pin 9):
The LSB Logic Input for the
Margining Function. Together with the MARGIN1 pin
determines whether the IC is in margin high, margin low,
or no margin state. This pin has a 50k internal pull-down
resistor.
I
ON
(Pin 7/Pin 10):
On-Time Current Input. Tie a resistor
from this pin to ground to set the one-shot timer current
and thereby set the switching frequency.
V
REFIN
(Pin 8/Pin 11):
Error Amplifier Reference Input.
The voltage at this pin must be greater than 0.5V and less
than 1V.
V
REFOUT
(Pin 9/Pin 12):
Buffered Internal 0.6V Reference
Output. The maximum current sinking limit is 50
μ
A at
this pin. Do not put a filter capacitor larger than 100pF on
this pin.
MPGM (Pin 10/Pin 13):
Programmable Margining Input.
A resistor from this pin to ground sets the margining
current. This current, together with the resistor between
the V
REFOUT
and V
REFIN
pins, determines the margining
voltage offset.
TRACK/SS (Pin 11/Pin 14):
Output Voltage Tracking and
Soft Start Input. When the IC is configured to be the master
of two outputs, a capacitor to ground at this pin sets the
ramp rate for the output voltage. When the IC is configured
(UH Package/G Package)
Ion Current vs V
IN
Current Limit Foldback
INPUT VOLTAGE (V)
0
I
μ
A
15
25
3770
G22
5
10
20
30
35
80
60
40
140
120
20
100
0
R
ON
= 82k
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LTC3770EG | 制造商:Linear Technology 功能描述:LDO Cntrlr SYNC BUCK REG 0.6V to 32V 28-Pin SSOP |
| LTC3770EG#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(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) |
| LTC3770EG#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(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) |
| LTC3770EUH#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN 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) |
| LTC3770EUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN 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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