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參數(shù)資料
| 型號： | LTC3860IUH#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220WHHD, QFN-32 |
| 文件頁數(shù)： | 10/36頁 |
| 文件大?。?/td> | 436K |
| 代理商： | LTC3860IUH#PBF |
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LTC3860
18
3860fc
APPLICATIONS INFORMATION
Multiphase Operation
When the LTC3860 is used in a single output, multiphase
application, the slave error ampliers must be disabled by
connecting their FB pins to VCC. All current limits should be
set to the same value using only one resistor to SGND per IC.
ILIM2 should then be connected to VCC. These connections
are shown in Table 3. In a multiphase application all COMP,
RUN and TRACK/SS pins must be connected together.
For output loads that demand high current, multiple
LTC3860s can be daisychained to run out of phase to
provide more output current without increasing input and
output voltage ripple. The CLKIN pin allows the LTC3860
to synchronize to the CLKOUT signal of another LTC3860.
The CLKOUT signal can be connected to the CLKIN pin of
the following LTC3860 stage to line up both the frequency
and the phase of the entire system. Tying the PHSMD pin to
VCC, SGND or oating it generates a phase difference
(between CLKIN and CLKOUT) of 240°, 60° or 90° respec-
tively, and a phase difference (between CH1 and CH2) of
120°, 180° or 180°. Figure 7 shows the PHSMD connections
necessary for 3-, 4-, 6- or 12-phase operation. A total of
12 phases can be daisychained to run simultaneously out
of phase with respect to each other.
BOOST
TG
LTC4449
VIN
12V
TS
VOUT
3860 F06a
RS
ESL
L
SENSE RESISTOR
PLUS PARASITIC
INDUCTANCE
FILTER COMPONENTS PLACED
NEAR SENSE PINS
CF 2RF ≤ ESL/RS
POLE-ZERO
CANCELLATION
VLOGIC
VCC
5V
IN
BG
GND
RF
CF
RF
VINSNS
VCC
PWM
ISNSP
ISNSN
LTC3860
GND
(6a) Using a Resistor to Sense Current
BOOST
TG
LTC4449
VIN
12V
TS
VOUT
3860 F06b
DCR
L
R1*
INDUCTOR
VLOGIC
VCC
5V
IN
*PLACE R1 NEAR INDUCTOR
PLACE C1 NEAR ISNSP, ISNSN PINS
BG
GND
C1*
VINSNS
VCC
PWM
ISNSP
ISNSN
LTC3860
GND
R1 C1 =
L
DCR
(6b) Using the Inductor to Sense Current
Figure 6. Two Different Methods of Sensing Current
Table 3. Multiphase Congurations
CH1
CH2
FB1
FB2
ILIM1
ILIM2
Master
Slave
On
Off
(FB = VCC)
Resistor
to GND
VCC
Slave
Off
(FB = VCC)
Off
(FB = VCC)
Resistor
to GND
VCC
Slave
Additional
Output
Off
(FB = VCC)
On
Resistor
to GND
Resistor
to GND
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相關(guān)代理商/技術(shù)參數(shù) |
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| LTC3861EUH-1#PBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN 制造商:Linear Technology 功能描述:BUCK CNTRL DUAL 12PH 2.25MHZ 32QFN 制造商:Linear Technology 功能描述:BUCK, CNTRL, DUAL, 12PH, 2.25MHZ, 32QFN 制造商:Linear Technology 功能描述:PWM CONTROLLER, BUCK, 2.25MHZ, 24V, QFN-32, Input Voltage:24V, Output Voltage:5.5V, Output Current:60A, Supply Voltage Min:3V, Supply Voltage Max:5.5V, Digital IC Case Style:QFN, No. of Pins:32, Frequency:2.25MHz , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Dual-Phase/Dual-Channel Step-Down Voltage Mode Controller w |
| LTC3861EUH-1#TRPBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN |
| LTC3861EUHE#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 36-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)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 |
| LTC3861EUHE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM VM 36-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準包裝: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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