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参数资料
| 型号： | ISL6420BIAZ-TK |
| 厂商： | Intersil |
| 文件页数： | 14/21页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-QSOP |
| 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： | 100% |
| 电源电压： | 4.5 V ~ 28 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： | 20-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
ISL6420B
VIN = 12V, V OUT = 3.3V, NO LOAD
1. The maximum r DS(ON) at the highest junction
temperature.
2. Determine I OC for I OC > I OUT ( MAX ) + ( Δ I ) ? 2 ,
where Δ I is the output inductor ripple current.
A small ceramic capacitor should be placed in parallel
with R OCSET to smooth the voltage across R OCSET in
the presence of switching noise on the input voltage.
Voltage Margining
The ISL6420B has a voltage margining mode that can
be used for system testing. The voltage margining
percentage is resistor selectable up to ±10%. The
voltage margining mode can be enabled by connecting
a margining set resistor from VMSET pin to ground and
using the control pins GPIO1/2 to toggle between
positive and negative margining (Refer to Table 3).
With voltage margining enabled, the VMSET resistor to
ground will set a current, which is switched to the FB
pin. The current will be equal to 2.468V divided by the
value of the external resistor tied to the VMSET pin.
Use a resistor in the range of 150k Ω to 400k Ω for
VMSET resistor.
V IN = 12V, V OUT = 3.3V, NO LOAD
FIGURE 12A.
NO LOAD
I VM = ------------------------
Δ V VM = 2.468V ------------------------
2.468V
R VMSET
R FB
R VMSET
(EQ. 2)
(EQ. 3)
The power supply output increases when GPIO2 is
HIGH and decreases when GPIO1 is HIGH. The amount
that the output voltage of the power supply changes
with voltage margining, will be equal to 2.468V x the
ratio of the external feedback resistor and the external
resistor tied to VMSET. Figure 11 shows the positive
and negative margining for a 3.3V output, using a
20.5k Ω feedback resistor and using various VMSET
resistor values.
3.7
3.6
FIGURE 12B.
V IN = 12V, V OUT = 3.3V, I OUT = 10A
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
150 175 200 225 250 275 300 325 350 375 400
RVMSET (k Ω )
FIGURE 11. VOLTAGE MARGINING vs. VMSET
RESISTANCE
FIGURE 13. PGOOD DELAY
14
FN6901.1
December 4, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6420BIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6420BIRZ-T7A | 制造商:Intersil Corporation 功能描述:53068P02 MASK ONLY, SYNC BUCK PWM CONT. WITH 4.5V-28V INPUT, - Tape and Reel 制造商:Intersil Corporation 功能描述:IC REG CTRLR BUCK PWM VM 20QFN 制造商:Intersil Corporation 功能描述:ISL6420 Series 4.5 - 28 V 20 A Synchronous Buck PWM Controller - QFN-20 制造商:Intersil Corporation 功能描述:Advanced Single Sync Buck PWM Controller 制造商:Intersil Corporation 功能描述:Advanced Single Syn Buck PWM Controller |
| ISL6420BIRZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6420BMAEP | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 20QSOP W - Rail/Tube |
| ISL6420BMAEP-TK | 制造商:Intersil Corporation 功能描述:VOLT MODE PWM CNTRLR 20QSOP W - Tape and Reel |
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