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參數資料
| 型號： | LTC3100EUD#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數： | 9/26頁 |
| 文件大?。?/td> | 403K |
| 描述： | IC REG BUCK/BOOST/LINEAR 16-QFN |
| 產品培訓模塊： | More Information on LDOs |
| 標準包裝： | 2,500 |
| 拓撲： | 降壓（降壓）（1），升壓（升壓）（1），線性（LDO）（1） |
| 功能： | 任何功能 |
| 輸出數： | 3 |
| 頻率 - 開關： | 1.5MHz |
| 電壓/電流 - 輸出 1： | 0.6 V ~ 5.5 V，250mA |
| 電壓/電流 - 輸出 2： | 1.5 V ~ 5.25 V，700mA |
| 電壓/電流 - 輸出 3： | 0.6 V ~ 5.25 V，100mA |
| 帶 LED 驅動器： | 無 |
| 帶監控器： | 無 |
| 帶序列發生器： | 是 |
| 電源電壓： | 0.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 16-QFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
LTC3100
9
3100fb
For more information www.linear.com/LTC3100
RUN Pin Threshold Voltage
Start-Up Delay Times vs V
IN
TYPICAL PERFORMANCE CHARACTERISTICS T
A
= 25癈, unless otherwise specified.
PIN FUNCTIONS
SWBST (Pin 1): Switch Pin for the Boost Converter.
Connect the boost inductor between SWBST and V
INBST
.
Keep PCB trace lengths as short and wide as possible to
reduce EMI. If the inductor current falls to zero, an internal
anti-ringing switch is connected from SWBST to V
INBST
to minimize EMI.
V
BST
(Pin 2): Output Voltage for the Boost Converter
(which is the drain of the internal synchronous rectifier)
and Input Voltage for the LDO. PCB trace length from V
BST
to the output filter capacitor (10礔 minimum) should be
as short and wide as possible.
V
LDO
(Pin 3): Output Voltage of the LDO Regulator. Connect
a 1礔 ceramic capacitor between V
LDO
and GND. Larger
values of capacitance may be used for higher PSRR or
improved transient response.
SWBK (Pin 4): Switch Pin for the Buck Converter. Connect
the buck inductor between SWBK and the buck output
filter capacitor. Keep PCB trace lengths as short and wide
as possible to reduce EMI.
V
INBK
(Pin 5): Input Voltage for the Buck Converter. Connect
a minimum of 4.7礔 ceramic decoupling capacitor from
this pin to ground.
PGBK (Pin 6): Open-Drain Output That Pulls Low When
FBBK Is More Than 8% Below Its Regulated Voltage. Con-
nect a pull-up resistor from this pin to a positive supply
less than 6V.
GND (Pin 7): Signal Ground. Provide a short, direct PCB
path between GND and the PC board ground plane con-
nected to the Exposed Pad.
RUNBK (Pin 8): Logic-Controlled Shutdown Input for the
Buck Converter. There is an internal 4M?pull-down on
this pin.
RUNBK = High: Normal operation
RUNBK = Low: Shutdown
FBBK (Pin 9): Feedback Input to the g
m
Error Amplifier
for the Buck Converter. Connect the resistor divider tap
to this pin. The output voltage can be adjusted from 0.6V
to 5.5V by:
V
OUT_BUCK
=0.600V" 1+
R6
R5
?/DIV>
?/DIV>
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?/DIV>
?/DIV>
?/DIV>
?/DIV>
RUNLDO (Pin 10): Logic-Controlled Shutdown Input for
the LDO Regulator. There is an internal 4M?pull-down
on this pin.
RUNLDO = High: Normal operation
RUNLDO = Low: Shutdown
V
IN
(V)
0.550
0.575
0.600
4 4.5
0.525
1.5
2.5
1
2
3 3.5
5
0.500
0.625
3100 G27
FALLING
RISING
V
IN
(V)
0.5 300
350
400
4
250
200
1.5 2.5
1
2
3
4.5
3.5
5
50
0
150
450
100
3100 G28
LDO
BOOST
BUCK
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