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参数资料
| 型号： | LTM4608IV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 8A 68-LGA |
| 产品培训模块： | Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4608 Spice Model |
| 产品目录绘图： | LTM Series_9x15x2.8 |
| 设计资源： | LTM4608IV#PBF Footprint.bxl |
| 特色产品： | μModule Products |
| 标准包装： | 170 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 2.7V |
| 电压 - 输入（最大）： | 5.5V |
| Voltage - Output 1： | 0.6 ~ 5 V |
| 电流 - 输出（最大）： | 8A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 68-LGA |
| 尺寸/尺寸： | 0.59" L x 0.35" W x 0.11" H（15.0mm x 9.0mm x 2.8mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 98% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
LTM4608
APPLICATIONS INFORMATION
R SR ≥
V IN ?
R FB4 ?
peak noise. Spread spectrum operation is disabled if
CLKIN is tied to ground or if it’s driven by an external
frequency synchronization signal. A capacitor value of
0.01μF must be placed from the PLLLPF pin to ground to
control the slew rate of the spread spectrum frequency
change. Add a control ramp on the TRACK pin with R SR
and C SR referenced to V IN . Figure 21 shows an example
for spread spectrum operation.
1
? ? 0.592 ? ?
? ? ln ? 1 ? ? ? 500 ? C SR ?
? ? ?
Output Voltage Tracking
Output voltage tracking can be programmed externally
using the TRACK pin. The output can be tracked up and
down with another regulator. The master regulator’s output
is divided down with an external resistor divider that is the
same as the slave regulator’s feedback divider to implement
coincident tracking. The LTM4608 uses an accurate 10k
resistor internally for the top feedback resistor. Figure 5
shows an example of coincident tracking:
? 10k ?
Slave = ? 1 + ? ? V TRACK
?
V TRACK is the track ramp applied to the slave’s track pin.
V TRACK has a control range of 0V to 0.596V, or the internal
reference voltage. When the master’s output is divided down
with the same resistor values used to set the slave’s output,
this resistor divider is connected to the slave’s track pin.
The slave will then coincident track with the master until it
reaches its final value. The master will continue to its final
value from the slave’s regulation point. Voltage tracking
is disabled when V TRACK is more than 0.596V. R FB4 in
Figure 5 will be equal to R FB2 for coincident tracking.
V IN
5V
V IN
SV IN
CLKIN
V OUT
C2
100pF
MASTER
3.3V
100μF 7A
TIE TO V IN
FOR DISABLE
AND DEFAULT
100μs SOFT-START
R SR C SR
RUN
TRACK
SW
RUN
PLLLPF
TRACK
MODE
FB
LTM4608
I TH
I THM
PGOOD
BSEL
R FB1
2.21k
C3
22pF
V IN
50k
APPLY A CONTROL
RAMP WITH R SR AND
C SR TIED TO V IN WHERE
t = –(ln (1 – 0.596/V IN ) ? R SR ? C SR )
OR APPLY AN EXTERNAL TRACKING RAMP
PHMODE MGN
CLKOUT GND SGND
50k
MASTER
3.3V
R FB3
10k
R FB4
6.65k
RUN
TRACK
V IN
SV IN
SW
RUN
PLLLPF
TRACK
MODE
CLKIN
V OUT
FB
LTM4608
I TH
I THM
PGOOD
BSEL
R FB2
6.65k
V IN
50k
C1
100μF
+
C4
100μF
POSCAP
SLAVE
1.5V
8A
PHMODE
MGN
CLKOUT GND SGND
50k
4608 F05
Figure 5. Dual Outputs (3.3V and 1.5V) with Tracking
4608fd
15
相关PDF资料 |
PDF描述 |
|---|---|
| LTM4609IV#PBF | IC BUCK/BOOST SYNC ADJ 4A 141LGA |
| LTM4612IV#PBF | IC BUCK SYNC ADJ 5A 133LGA |
| LTM4613MPV#PBF | IC UMODULE DC/DC 8A 133-LGA |
| LTM4614IV#PBF | IC UMODULE DC/DC DUAL 4A 144LGA |
| LTM4615IV#PBF | IC SWIT REG BUCK 4A ADJ 144LGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4608V | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low VIN, 8A DC/DC μModuleTM with Tracking, Margining, and Frequency Synchronization |
| LTM4609 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency, Synchronous, 4-Switch Buck-Boost Controller |
| LTM4609_12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:36VIN, 34VOUT High Efficiency Buck-Boost DC/DC |
| LTM4609EV | 制造商:LINER 制造商全称:Linear Technology 功能描述:36VIN, 34VOUT High Effi ciency Buck-Boost DC/DC μModule |
| LTM4609EV#PBF | 功能描述:IC UMODULE BUCK-BOOST 141-LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:66V 电压 - 输入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:50W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
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