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参数资料
| 型号： | ISL6505CB |
| 厂商： | Intersil |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | IC MULTIPLE POWER CTRLR 20-SOIC |
| 标准包装： | 38 |
| 应用： | 电源控制器/监控器 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 电流 - 电源： | 6mA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
ISL6505
supported. 3.3V DUAL /3.3V SB and V OUT1 outputs will come
up right after bias voltage surpasses POR level (but if LAN =
GND, then V OUT1 output will not come up until the soft-start
ramp, along with V OUT2 ; see Figure 9).
During sleep-to-active state transitions from conditions
where the 5V DUAL output is initially GND (such as S5 to S0
transition, or simple power-up sequence directly into active
state), the circuit goes through a quasi soft-start, the
5V DUAL output being pulled high through the body diode of
the NMOS FET connected between it and the 5V ATX.
Figure 9 exemplifies this start-up case. 5V SB is already
present when the main ATX outputs are turned on, at time
T0. As a result of +5V IN ramping up, the 5V DUAL output
capacitors charge up through the body diode of Q5 (see
Typical Application). At time T1, all main ATX outputs exceed
the ISL6505’s undervoltage thresholds, and the internal
50ms (typical) timer is initiated. At T2, the time-out initiates a
soft-start, and the 1.2V voltage ID output is ramped-up,
reaching regulation limits at time T3. Simultaneous with the
beginning of this ramp-up, at time T2, the DLA pin is
released, allowing the pull-up resistor to turn on Q3 and Q5,
and bring the 5V DUAL output in regulation. Shortly after time
T3, as the SS voltage reaches 3.0V, the soft-start capacitor
is quickly discharged down to approximately 2.7V, where it
remains until a valid sleep state request is received from the
system.
+12V IN
Fault Protection
All of the outputs are monitored against undervoltage events.
A severe overcurrent caused by a failed load on any of the
outputs, would, in turn, cause that specific output to
suddenly drop. If any of the output voltages drops below 80%
(typical) of their set value, such event is reported by having
the FAULT pin pulled to 5V. Additionally, exceeding the
maximum current rating of an integrated regulator (output
with pass transistor on-chip) can lead to output voltage
drooping; if excessive, this droop can ultimately trip the
undervoltage detector and send a FAULT signal to the
computer system.
A FAULT condition occurring on an output when controlled
through an external pass transistor will only set off the
FAULT flag, and it will not shut off or latch off any part of the
circuit. A FAULT condition occurring on an output controlled
through an internal pass transistor (1V2VID only), will set off
the FAULT flag, and it will shut off the respective faulting
regulator (1V2VID only). If shutdown or latch off of the entire
circuit is desired in case of a fault, regardless of the cause,
this can be achieved by externally pulling or latching the SS
pin low. Pulling the SS pin low will also force the FAULT pin
to go low and reset any internally latched-off output.
Special consideration is given to the initial start-up
sequence. If, following a 5V SB POR event, any of the V OUT1
or 3.3V DUAL /3.3V SB outputs is ramped up and is subject to
an undervoltage event before the end of the second soft-
start ramp, then the FAULT output goes high and the entire
INPUT VOLTAGES
(2V/DIV)
DLA PIN
(2V/DIV)
IC latches off. Latch-off condition can be reset by cycling the
bias power (5V SB ). Undervoltage events on the V OUT1 and
the 3.3V DUAL /3.3V SB outputs at any other times are
+5V SB
0V
+5V IN
+3.3V IN
SOFT-START
(1V/DIV)
handled according to the description found in the second
paragraph under the current heading.
Another condition that could set off the FAULT flag is chip
overtemperature. If the ISL6505 reaches an internal
temperature of 140 o C (typical), the FAULT flag is set, but the
chip continues to operate until the temperature reaches
OUTPUT
VOLTAGES
(1V/DIV)
V OUT4 (5V DUAL )
155 o C (typical), when unconditional shutdown of all outputs
takes place. Operation resumes only after powering down
the IC (to create a 5V SB POR event) and a start-up
(assuming the cause of the fault has been removed; if not, as
V OUT3 (3.3V DUAL /3.3V SB )
it heats up again, it will repeat the FAULT cycle).
In ISL6505 applications, loss of the active ATX output (3V3
0V
V OUT1 (LAN = 5V)
V OUT2 (1.2V VID )
V OUT1 (LAN = GND)
or 5V, as detected by the on-board voltage monitor) during
active state operation causes the chip to switch to S5 sleep
state, in addition to reporting the input UV condition on the
FAULT pin. Exiting from this forced S5 state can only be
T0
T1
T2
T3
achieved by returning the faulting input voltage above its UV
TIME
FIGURE 9. SOFT-START INTERVAL IN ACTIVE STATE
threshold, by resetting the chip through removal of 5V SB
bias voltage, or by bringing the SS pin at a potential lower
than 0.8V.
10
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相关代理商/技术参数 |
参数描述 |
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| ISL6505CB-T | 功能描述:IC MULTIPLE POWER CTRLR 20-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL6505CR | 功能描述:IC MULTIPLE POWER CTRLR 20-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL6505CR-T | 功能描述:IC MULTIPLE POWER CTRLR 20-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL6505CRZ | 功能描述:IC PWR SUPPLY CTRLR/MONITR 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL6505CRZ-T | 功能描述:IC PWR SUPPLY CTRLR/MONITR 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
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