参数资料
型号: LTC3736EUF#PBF
厂商: Linear Technology
文件页数: 7/28页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 24-QFN
标准包装: 91
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
频率 - 最大: 825kHz
占空比: 100%
电源电压: 2.75 V ~ 9.8 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-WFQFN 裸露焊盘
包装: 管件
产品目录页面: 1335 (CN2011-ZH PDF)
LTC3736
PI FU CTIO S
(UF/GN Package)
For auxiliary winding applications, connect to a resistor
divider from the auxiliary output. To synchronize with an
external clock using the PLL, apply a CMOS compatible
clock with a frequency between 250kHz and 850kHz. To
select Burst Mode operation at light loads, tie this pin to V IN .
Grounding this pin selects forced continuous operation,
which allows the inductor current to reverse. When
synchronized to an external clock, pulse-skipping operation
is enabled at light loads.
BG1/BG2 (Pins 19, 13/Pins 22, 16): Bottom (NMOS) Gate
Drive Output. These pins drive the gates of the external N-
channel MOSFETs. These pins have an output swing from
PGND to SENSE + .
SENSE1 + /SENSE2 + (Pins 21, 11/Pins 24, 14): Positive
Input to Differential Current Comparator. Also powers the
gate drivers. Normally connected to the source of the ex-
ternal P-channel MOSFET.
SW1/SW2 (Pins 22, 10/Pins 1, 13): Switch Node Connec-
tion to Inductor. Also the negative input to differential peak
current comparator and an input to the reverse current
comparator. Normally connected to the drain of the exter-
nal P-channel MOSFETs, the drain of the external N-channel
MOSFET and the inductor.
IPRG1/IPRG2 (Pins 23, 2/Pins 2, 5): Three-State Pins to
Select Maximum Peak Sense Voltage Threshold. These pins
select the maximum allowed voltage drop between the
SENSE + and SW pins (i.e., the maximum allowed drop
across the external P-channel MOSFET) for each channel.
Tie to V IN , GND or float to select 204mV, 85mV or 125mV
respectively.
V FB1 /V FB2 (Pins 24, 7/Pins 3, 10): Feedback Pins. Receives
the remotely sensed feedback voltage for its controller from
an external resistor divider across the output.
FU CTIO AL DIAGRA
(Common Circuitry)
R VIN
V IN
UNDERVOLTAGE
LOCKOUT
V IN
VOLTAGE
REFERENCE
C VIN
0.6V
V REF
(TO CONTROLLER 1, 2)
RUN/SS
0.7 μ A
SHDN
SYNC/FCB
EXTSS
BURST DEFEAT/
SYNC DETECT
t SEC = 1ms
BURSTDIS
PHASE
DETECTOR
+
INTSS
PLLLPF
VOLTAGE
CONTROLLED
OSCILLATOR
CLK1
CLK2
SLOPE
COMP
SLOPE1
SLOPE2
V FB1
FCB
FCB
UV1
OV1
PGOOD
IPRG1
0.6V
0.54V
SHDN
CONTROLLED
OSCILLATOR
IPRG2
VOLTAGE
MAXIMUM
SENSE VOLTAGE
SELECT
IPROG1
IPROG2
V FB2
+
UV2
OV2
3736 FD
3736fa
7
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LTC3737EGN#PBF 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR)
LTC3737EGN#TR 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR)
LTC3737EGN#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR)
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