- 您现在的位置：买卖IC网 > PDF目录15167 > ZL2008ALBFT1 (Intersil)IC REG CTRLR BUCK PWM VM 36-QFN PDF资料下载
参数资料
| 型号： | ZL2008ALBFT1 |
| 厂商： | Intersil |
| 文件页数： | 27/42页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 36-QFN |
| 标准包装： | 1,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.4MHz |
| 占空比： | 95% |
| 电源电压： | 3 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 ~ 85°C |
| 封装/外壳： | 36-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
ZL2008
4. Continue operating through the fault (this could result in
permanent damage to the power supply).
5. Initiate an immediate shutdown.
The default response from an overcurrent fault is an immediate
shutdown of the device. The device will continuously check for
the presence of the fault condition, and if the fault condition no
longer exists the device will be re-enabled.
Please refer to Application Note AN2033 for details on how to
select specific overcurrent fault response options via I 2 C/SMBus.
Thermal Overload Protection
The ZL2008 includes an on-chip thermal sensor that
continuously measures the internal temperature of the die and
shuts down the device when the temperature exceeds the preset
limit. The default temperature limit is set to +125°C in the
factory, but the user may set the limit to a different value if
desired. See Application Note AN2033 for details. Note that
setting a higher thermal limit via the I 2 C/SMBus interface may
result in permanent damage to the device. Once the device has
been disabled due to an internal temperature fault, the user may
select one of several fault response options as follows:
1. Initiate a shutdown and attempt to restart an infinite number
of times with a preset delay period between attempts.
2. Initiate a shutdown and attempt to restart a preset number of
times with a preset delay period between attempts.
3. Continue operating for a given delay period, followed by
shutdown if the fault still exists.
4. Continue operating through the fault (this could result in
permanent damage to the power supply).
5. Initiate an immediate shutdown.
If the user has configured the device to restart, the device will
wait the preset delay period (if configured to do so) and will then
check the device temperature. If the temperature has dropped
below a threshold that is approx +15°C lower than the selected
temperature fault limit, the device will attempt to re-start. If the
temperature still exceeds the fault limit the device will wait the
preset delay period and retry again.
27
The default response from a temperature fault is an immediate
shutdown of the device. The device will continuously check for
the fault condition, and once the fault has cleared the ZL2008
will be re-enabled.
Please refer to Application Note AN2033 for details on how to
select specific temperature fault response options via
I 2 C/SMBus.
Voltage Tracking
Numerous high performance systems place stringent demands
on the order in which the power supply voltages are turned on.
This is particularly true when powering FPGAs, ASICs, and other
advanced processor devices that require multiple supply voltages
to power a single die. In most cases, the I/O interface operates at
a higher voltage than the core and therefore the core supply
voltage must not exceed the I/O supply voltage according to the
manufacturers' specifications.
Voltage tracking protects these sensitive ICs by limiting the
differential voltage between multiple power supplies during the
power-up and power down sequence. The ZL2008 integrates a
lossless tracking scheme that allows its output to track a voltage
that is applied to the VTRK pin with no external components
required. The VTRK pin is an analog input that, when tracking
mode is enabled, configures the voltage applied to the VTRK pin
to act as a reference for the device’s output regulation.
The ZL2008 offers two mode of tracking as follows:
1. Coincident . This mode configures the ZL2008 to ramp its
output voltage at the same rate as the voltage applied to the
VTRK pin.
2. Ratiometric . This mode configures the ZL2008 to ramp its
output voltage at a rate that is a percentage of the voltage
applied to the VTRK pin. The default setting is 50%, but an
external resistor string may be used to configure a different
tracking ratio.
Figure 20 illustrates the typical connection and the two tracking
modes.
The master ZL2008 device in a tracking group is defined as the
device that has the highest target output voltage within the group.
This master device will control the ramp rate of all tracking devices
and is not configured for tracking mode. A delay of at least 10ms
must be configured into the master device using the SS pin, and the
user may also configure a specific ramp rate using the SS pin. Any
device that is configured for tracking mode will ignore its soft-start
delay and ramp time settings (SS pin) and its output will take on the
turn-on/turn-off characteristics of the reference voltage present at
the VTRK pin. All of the ENABLE pins in the tracking group must be
connected together and driven by a single logic source. Tracking is
configured via the I 2 C/SMBus interface by using the TRACK_CONFIG
PMBus command. Please refer to Application Note AN2033 for
more information on configuring tracking mode using PMBus.
FN6859.4
April 29, 2011
相关PDF资料 |
PDF描述 |
|---|---|
| VE-B5Y-EX-F4 | CONVERTER MOD DC/DC 3.3V 49.5W |
| ZL6100ALAFTK | IC REG CTRLR BUCK PWM VM 36-QFN |
| VE-B5Y-EX-F3 | CONVERTER MOD DC/DC 3.3V 49.5W |
| ZL6100ALAFT | IC REG CTRLR BUCK PWM VM 36-QFN |
| VE-B5Y-EX-F2 | CONVERTER MOD DC/DC 3.3V 49.5W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ZL2008EVAL1Z | 功能描述:EVALUATION BOARD FOR ZL2008 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ZL20200 | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Dual Band IS136/AMPS Transceiver |
| ZL20200_06 | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Dual Band IS136/AMPS Transceiver |
| ZL20200LCE | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Dual Band IS136/AMPS Transceiver |
| ZL20200LCF | 制造商:ZARLINK 制造商全称:Zarlink Semiconductor Inc 功能描述:Dual Band IS136/AMPS Transceiver |
发布紧急采购，3分钟左右您将得到回复。