- 您现在的位置：买卖IC网 > PDF目录20399 > DC1367A (Linear Technology)BOARD EVAL LTM4615 PDF资料下载
参数资料
| 型号： | DC1367A |
| 厂商： | Linear Technology |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTM4615 |
| 软件下载： | LTM4615 |
| 设计资源： | DC1367A Design Files DC1367A Schematic |
| 标准包装： | 1 |
| 系列： | LTM®, uModule® |
| 主要目的： | DC/DC，LDO 步降 |
| 输出及类型： | 3，非隔离 |
| 输出电压： | 1.8V，1.2V，1V |
| 电流 - 输出： | 4A，2.5A，1.5A |
| 输入电压： | 2.5 ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1.25MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LTM4615 |
| 相关产品： | LTM4615EV#PBF-ND - IC SWIT REG BUCK 4A ADJ 144LGA LTM4615IV#PBF-ND - IC SWIT REG BUCK 4A ADJ 144LGA |
LTM4615
APPLICATIONS INFORMATION
R FB1
? 4.99k + R FB1 ?
R FB1 ?
FaultConditions:CurrentLimitandOvertemperature
Protection
The LTM4615 has current mode control, which inher-
ently limits the cycle-by-cycle inductor current not only
in steady-state operation, but also in transient.
Along with current limiting in the event of an overload
condition, the LTM4615 has overtemperature shutdown
protection that inhibits switching operation around 150°C
for each channel.
Run Enable and Soft-Start
The RUN/SS pins provide a dual function of enable and
soft-start control for each channel. The RUN/SS pins are
used to control turn on of the LTM4615. While each enable
pin is below 0.5V, the LTM4615 will be in a low quiescent
current state. At least a 0.8V level applied to the enable
pins will turn on the LTM4615 regulators. This pin can be
used to sequence the regulator channels. The soft-start
control is provided by a 1M pull-up resistor (R SS ) and a
1000pF capacitor (C SS ) as drawn in the block diagram
for each channel. An external capacitor can be applied to
the RUN/SS pin to increase the soft-start time. A typical
value is 0.01μF. The approximate equation for soft-start:
where R SS and C SS are shown in the block diagram of
Figure 1, and the 1.8V is soft-start upper range. The soft-
start function can also be used to control the output ramp-up
time, so that another regulator can be easily tracked to it.
Output Voltage Tracking
Output voltage tracking can be programmed externally
using the TRACK pins. Either output can be tracked up
or 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 LTM4615 uses a
very accurate 4.99k resistor for the internal top feedback
resistor. Figure 2 shows an example of coincident tracking.
Equations:
? ?
TRACK1 = ? ? ? Master
? 4.99k ?
Slave = ? 1 + ? ? TRACK1
?
V IN
t SOFTSTART = In ? ? ? R SS ? C SS
? ?
? V IN – 1.8V ?
V IN 3V TO 5.5V
PGOOD1 10μF
C1
6.3V
C2
10μF
6.3V
PGOOD2
R FB1
R TA
3.32k
1V
SLAVE
1.2V
4A
C10
22μF
6.3V
C3
22μF
6.3V
C9
22μF
6.3V
C4
22μF
6.3V
R3
10k
R TB
4.99k
1.5V
L1 0.2μH*
1.2V
C12
10k 10k 10μF
*FAIR-RITE 0805 2508056007Y6
OPTIONAL FILTER
V IN1
PGOOD1
V OUT1
FB1
COMP1
TRACK1
RUN/SS1
LDO_IN
EN3
BOOST3
GND1
LTM4615
GND2
V IN2
PGOOD2
V OUT2
FB2
COMP2
TRACK2
RUN/SS2
LDO_OUT
FB3
PGOOD3
GND3
R4
10k
V IN OR A CONTROL RAMP
1V LOW NOISE AT 1A
C11
10μF
PGOOD3 R5 6.3V
R6
10k
LOW NOISE
C13
C SSEXT
R FB2
5.76k
C5
22μF
6.3V
C6
22μF
6.3V
C7
22μF
6.3V
4615 F02
MASTER
1.5V
4A
C8
22μF
6.3V
Figure 2. Dual Outputs (1.5V and 1.2V) with Tracking
12
For more information www.linear.com/LTM4615
4615fb
相关PDF资料 |
PDF描述 |
|---|---|
| R0.25D12-1224/HP-R | CONV DC/DC 0.25W 12VIN +/-24VOUT |
| T95Z226M016LSAL | CAP TANT 22UF 16V 20% 2910 |
| OVP-12G | OVP MOD CASES B,C,N,D,ECT+DATA |
| 412-59584-G | COVER FOR MAP55 & MAP40-1005 |
| R0.25D12-1215/HP-R | CONV DC/DC 0.25W 12VIN +/-15VOUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1369A-A | 功能描述:BOARD DEMO 125MSPS LTC2261-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1369A-B | 功能描述:BOARD DEMO 105MSPS LTC2260-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1369A-C | 功能描述:BOARD DEMO 80MSPS LTC2259-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1369A-D | 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC1371 & DC1075 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC1371 & DC1075; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2258-14; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide |
| DC1369A-E | 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC1371 & DC1075 制造商:Linear Technology 功能描述:14BIT ADC Eval Brd, Rq. DC1371 & DC1075; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2257-14; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide |
发布紧急采购，3分钟左右您将得到回复。