参数资料
型号: LTC3727EG-1
厂商: Linear Technology
文件页数: 26/32页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 28-SSOP
标准包装: 47
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
频率 - 最大: 580kHz
占空比: 99%
电源电压: 4 V ~ 36 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: 28-SSOP(0.209",5.30mm 宽)
包装: 管件
LTC3727/LTC3727-1
APPLICATIO S I FOR ATIO
2. Are the signal and power grounds kept separate? The
combined LTC3727 signal ground pin and the ground
return of C INTVCC must return to the combined C OUT (–)
terminals. The path formed by the top N-channel MOSFET,
Schottky diode and the C IN capacitor should have short
leads and PC trace lengths. The output capacitor (–)
terminals should be connected as close as possible to the
(–) terminals of the input capacitor by placing the capaci-
tors next to each other and away from the Schottky loop
described above.
3. Do the LTC3727 V OSENSE pins resistive dividers con-
nect to the (+) terminals of C OUT ? The resistive divider
must be connected between the (+) terminal of C OUT and
signal ground. The R2 and R4 connections should not be
along the high current input feeds from the input
capacitor(s).
4. Are the SENSE – and SENSE + leads routed together
with minimum PC trace spacing? The filter capacitor
between SENSE + and SENSE – should be as close as
possible to the IC. Ensure accurate current sensing with
Kelvin connections at the SENSE resistor.
5. Is the INTV CC decoupling capacitor connected close to
the IC, between the INTV CC and the power ground pins?
This capacitor carries the MOSFET drivers current peaks.
An additional 1 μ F ceramic capacitor placed immediately
next to the INTV CC and PGND pins can help improve noise
performance substantially.
R PU
V PULL-UP
1
RUN/SS1
PGOOD
28
PGOOD
(<7V)
2
SENSE1 +
TG1
27
L1
V OUT1
R2
3
SENSE1 –
SW1
26
R SENSE
R1
4
V OSENSE1
BOOST1
25
C B1
M1
M2
D1
f IN
5
PLLFLTR
V IN
24
6
PLLIN
BG1
23
R IN
C OUT1
INTV CC
7
8
9
FCB
I TH1
SGND
LTC3727
EXTV CC
INTV CC
PGND
22
21
20
C INTVCC
C VIN
V IN
C IN
C OUT2
GND
3.3V
10
3.3V OUT
BG2
19
11
I TH2
BOOST2
18
D2
12
V OSENSE2
SW2
17
C B2
M3
M4
R3
R4
13
SENSE2 –
TG2
16
R SENSE
V OUT2
14
SENSE2 +
RUN/SS2
15
L2
3727 F10
Figure 10. LTC3727 Recommended Printed Circuit Layout Diagram
3727fc
26
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LTC3727EG-1#TR 功能描述:IC REG CTRLR BUCK PWM CM 28-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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 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:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC3727EG-1#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 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:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
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