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參數(shù)資料
| 型號： | ISL6223CA-T |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| 中文描述： | SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大小： | 402K |
| 代理商： | ISL6223CA-T |
8
the 5V supply rises. The PGOOD output stage is made up of
NMOS and PMOS transistors. On the rising V
CC
, the PMOS
device becomes active slightly before the NMOS transistor
pulls “down”, generating the slight rise in the PGOOD
voltage.
Note that Figure 5 shows the 12V battery voltage available
before the 5V supply to the ISL6223 has reached its
threshold level. If conditions were reversed and the 5V
supply was to rise first, the start-up sequence would be
different. In this case the ISL6223 will sense an overcurrent
condition due to charging the output capacitors. The supply
will then restart and go through the normal Soft-Start cycle.
.
Fault Protection
The ISL6223 protects the microprocessor and the entire
power system from damaging stress levels. Within the
ISL6223 both Overvoltage and Overcurrent circuits are
incorporated to protect the load and regulator.
Overvoltage
The VSEN pin is connected to the microprocessor CORE
voltage. A CORE overvoltage condition is detected when the
VSEN pin goes above 2.35V.
The overvoltage condition is latched, disabling normal PWM
operation, and causing PGOOD to go low. The latch can
only be reset by lowering and returning V
CC
high to initiate a
POR and Soft-Start sequence.
During a latched overvoltage, the PWM outputs will be
driven either low or three state, depending upon the VSEN
input. PWM outputs are driven low when the VSEN pin
detects that the CORE voltage is above 2.35V. This condition
drives the PWM outputs low, resulting in the lower or
synchronous rectifier MOSFETs to conduct and shunt the
CORE voltage to ground to protect the load.
If after this event, the CORE voltage falls below 1.7V, the
PWM outputs will be three state. The HIP6601 family drivers
pass the three state information along, and shuts off both
upper and lower MOSFETs. This prevents “dumping” of the
output capacitors back through the lower MOSFETs,
avoiding a possibly destructive ringing of the capacitors and
output inductors. If the conditions that caused the
overvoltage still persist, the PWM outputs will be cycled
between three state and V
CORE
clamped to ground, as a
hysteretic shunt regulator.
Undervoltage
The VSEN pin also detects when the CORE voltage falls
below 0.9V level. This causes PGOOD to go low, but has no
other effect on operation and is not latched. There is also
hysteresis in this detection point.
PWM 1
OUTPUT
PGOOD
V
CORE
EN
SWITCH
V
IN
= 12V
FIGURE 3. START-UP OF A SYSTEM OPERATING AT 200kHz
DELAY TIME
PGOOD
V
CORE
EN
SWITCH
V COMP
V
IN
= 12V
FIGURE 4. START-UP A SYSTEM OPERATING AT 200kHz
DELAY TIME
12V
SUPPLY
PGOOD
5V
SUPPLY
V
CORE
FIGURE 5. SUPPLY POWERED BY ATX SUPPLY
DELAY TIME
ISL6223
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6223CA | Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| ISL6223 | Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6223EVAL1 | Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| ISL6223EVAL2 | Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| ISL6224CA-T | Single Output Mobile-Friendly PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6223CAZA | 功能描述:IC REG CTRLR BUCK PWM 20-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6223CAZAR5194 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| ISL6223CAZA-T | 功能描述:IC REG CTRLR BUCK PWM 20-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6223EVAL1 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| ISL6223EVAL2 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
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