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参数资料
| 型号： | LTC3778EF#TR |
| 厂商： | Linear Technology |
| 文件页数： | 21/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 20TSSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 电源电压： | 4 V ~ 36 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 ~ 85°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC3778EFTR |
LTC3778
APPLICATIO S I FOR ATIO
? Segregate the signal and power grounds. All small
signal components should return to the SGND pin at
one point which is then tied to the PGND pin close to the
source of M2.
? Place M2 as close to the controller as possible, keeping
the PGND, BG and SW traces short.
? Connect the input capacitor(s) C IN close to the power
MOSFETs. This capacitor carries the MOSFET AC cur-
rent.
TYPICAL APPLICATIO S
Figure 10 shows a DDR memory termination application in
which the output can sink and source up to 6A of current.
? Keep the high dV/dT SW, BOOST and TG nodes away
from sensitive small-signal nodes.
? Connect the INTV CC decoupling capacitor C VCC closely
to the INTV CC and PGND pins.
? Connect the top driver boost capacitor C B closely to the
BOOST and SW pins.
? Connect the V IN pin decoupling capacitor C F closely to
the V IN and PGND pins.
an offset to the SENSE – pin so that the current limit is
symmetrical during both sink and source.
The resistive divider of R1 and R2 are meant to introduce
V IN
C SS
0.1 μ F
1
2
R PG
100k 3
LTC3778
RUN/SS BOOST
VON TG
PGOOD SW
20
19
18
D B
CMDSH-3
C B
0.22 μ F
M1
IRF7811
L1, 1.8 μ H
C IN
10 μ F
35V
× 3
5V TO 25V
330 μ F
25V,
SANYO
ELECTROLYTIC
V OUT
1.25V
± 6A
C C1
1500pF R C
20k
C C2
100pF
4
5
6
V RNG
I TH
FCB
SENSE +
SENSE –
PGND
17
16
15
R2
68 ?
R1
1.2k
M2
IRF7811
D1
B340A
+
C OUT1-2
180 μ F
4V
× 2
C OUT3
22 μ F
6.3V
X7R
7
SGND
BG
14
C ON , 0.01 μ F
R1
8
I ON
DRV CC
13
C VCC
4.7 μ F
12.7k
R2
11.7k
R ON
227k
9
10
V FB
EXTV CC
INTV CC
V IN
12
11
R F
1 ?
C F
0.1 μ F
3778 F11
C IN : UNITED CHEMICON THCR60EIHI06ZT
C OUT1-2 : CORNELL DUBILIER ESRE181E04B
L1: SUMIDA CEP125-1R8MC-H
Figure 10. 1.25V/ ± 6A Sink and Source at 550kHz
3778f
21
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相关代理商/技术参数 |
参数描述 |
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| LTC3780EG | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 24-Pin SSOP |
| LTC3780EG#PBF | 功能描述:IC REG CTRLR BST 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:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 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:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LTC3780EG#TR | 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Synchronous Boost/Buck Controller 4V to 36V Input 24-Pin SSOP T/R |
| LTC3780EG#TRPBF | 功能描述:IC REG CTRLR BST 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:- 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 |
| LTC3780EGPBF | 制造商:Linear Technology 功能描述:4-Switch Buck-Boost Controller SSOP24 |
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