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參數(shù)資料
| 型號(hào)： | ISL6420AIAZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| 中文描述： | 0.05 A SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 0.150 INCH, GREEN, PLASTIC, QSOP-20 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 560K |
| 代理商： | ISL6420AIAZ |
11
FN9169.1
October 13, 2005
VMSET/MODE -
This pin is a dual function pin. Tie this pin to
VCC5 to disable voltage margining. When not tied to VCC5,
this pin serves as VMSET. Connect a resistor from this pin to
ground to set delta for voltage margining. If voltage
margining and external reference tracking mode are not
needed, this pin can be tied directly to ground.
GPIO2
- This is general purpose IO pin for voltage
margining. Refer to Table 2.
Functional Description
Initialization
The ISL6420A automatically initializes upon receipt of
power. The Power-On Reset (POR) function monitors the
internal bias voltage generated from LDO output (VCC5) and
the ENSS pin. The POR function initiates the soft-start
operation after the VCC5 exceeds the POR threshold. The
POR function inhibits operation with the chip disabled
(ENSS pin <1V).
The device can operate from an input supply voltage of 5.6V
to 28V connected directly to the VIN pin using the internal 5V
linear regulator to bias the chip and supply the gate drivers.
For 5V ±10% applications, connect VIN to VCC5 to bypass
the linear regulator.
Soft-Start/Enable
The ISL6420A soft-start function uses an internal current
source and an external capacitor to reduce stresses and
surge current during startup.
When the output of the internal linear regulator reaches the
POR threshold, the POR function initiates the soft-start
sequence. An internal 10μA current source charges an
external capacitor on the ENSS pin linearly from 0V to 3.3V.
When the ENSS pin voltage reaches 1V typically, the
internal 0.6V reference begins to charge following the dv/dt
of the ENSS voltage. As the soft-start pin charges from 1V to
1.6V, the reference voltage charges from 0V to 0.6V.
Figure 9 shows a typical soft-start sequence.
TABLE 2. VOLTAGE MARGINING CONTROLLED BY GPIO1
AND GPIO2
GPIO1
GPIO2
VOUT
L
L
No Change
L
H
+ Delta VOUT
H
L
- Delta VOUT
H
H
Ignored
TABLE 3. VOLTAGE MARGINING/DDR OR TRACKING SUPPLY PIN CONFIGURATION
FUNCTION/MODES
PIN CONFIGURATIONS
COMMENTS
VMSET/MODE
REFOUT
GPIO1/REFIN
GPIO2
Enable Voltage Margining
Pin Connected
to GND with
resistor. It is
used as VMSET.
Connect a 1μF
capacitor for
bypass of external
reference.
Serves as a general
purpose I/O. Refer to
Table 2
Serves as a
general purpose
I/O. Refer to
Table 2
REFIN or REFOUT functions
will not be available in this
mode. The internal 0.6V
reference is used.
No Voltage Margining. Normal
operation using internal reference.
REFOUT not used.
Pin Connected
to GND with
resistor. It is
used as VMSET
Connect a 1μF
capacitor for
bypass of external
reference.
L
L
No Voltage Margining. Normal
operation with internal reference.
Buffered V
REFOUT
= 0.6V.
H
Connect a 2.2μF
capacitor to GND.
H
L
No Voltage Margining. External
reference. Buffered V
REFOUT
=
V
REFIN
H
Connect a 2.2μF
capacitor to GND.
Connect to an external
reference voltage
source (0.6V to 1.25V)
L
NOTES:
1. The GPIO1/REFIN and GPIO2 pins cannot be left floating.
2. Ensure that GPIO1/REFIN is tied high prior to the logic change at VMSET/MODE.
FIGURE 9. TYPICAL SOFT-START WAVEFORM
V
IN
= 28V, V
OUT
= 3.3V, I
OUT
= 10A
ISL6420A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6420AIRZ | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| ISL6420AIRZ-TK | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| ISL6420A | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller(單片同步降壓脈寬調(diào)制控制器) |
| ISL6420AIAZ-TK | Circular Connector; No. of Contacts:22; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:12-35 RoHS Compliant: No |
| ISL6420IAZ-TK | PCB Relay; Contacts:SPDT; Contact Carry Current:500mA; Coil Voltage DC Max:9V; Relay Terminals:SMT Gullwing; Coil Resistance:405ohm; Contact Rating:10mA at 30VAC; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):No RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6420AIAZS2698 | 制造商:Intersil Corporation 功能描述:PB-FREE SYNC BUCK PWM CONT. W/ 4.5V-28V INPUT,20LD QSOP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| ISL6420AIAZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QSOP 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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) |
| ISL6420AIAZ-TKS2698 | 制造商:Intersil Corporation 功能描述:PB-FREE SYNC BUCK PWM CONT. W/ 4.5V-28V INPUT,20LD QSOP, T&R - Tape and Reel |
| ISL6420AIR | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 0.6V TO 27.5V 700MA 20QFN - Rail/Tube |
| ISL6420AIR-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
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