参数资料
| 型号： | ISL8120IRZ |
| 厂商： | Intersil |
| 文件页数： | 33/35页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 32-QFN |
| 标准包装： | 60 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.5MHz |
| 占空比： | 90% |
| 电源电压： | 3 V ~ 22 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： | 32-VFQFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1244 (CN2011-ZH PDF) |
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页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页
ISL8120
VSENSE- (REMOTE)
VOUT (LOCAL)
10 Ω
VSENSE+ (REMOTE)
GND (LOCAL)
10 Ω
C SEN
R OS
R FB
Z FB
Z COMP
VCC
VSEN-
VSEN+
VMON
FB
COMP
PGOOD
700mV
GAIN=1
V REF
OV/UV
COMP
ERROR AMP
PGOOD
FIGURE 24. SIMPLIFIED REMOTE SENSING IMPLEMENTATION
Since the UV/OV comparator uses the same internal reference
0.6V, to guarantee UV/OV and Pre-charged start-up functions
of Channel 2, the target voltage derived from Channel 1
(VDDQ) should be scaled close to 0.6V, and it is suggested to
VDDQ
PHASE-SHIFTED
CLOCK
VCC
VSEN2-
be slightly above (+2%) 0.6V with an external resistor divider,
ISL8120
which will have Channel 2 use the internal 0.6V reference after
soft-start. Any capacitive load at REFIN pin should not slow
k*R
CLKOUT/REFIN
STATE
MACHINE
down the ramping of this input 150mV lower than the Channel
k = ------------ – 1
2’ internal ramp. Otherwise, the UV protection could be fault
triggered prior to the end of the soft-start. The start-up of
Channel 2 can be delayed to avoid such situation happening, if
high capacitive load presents at REFIN pin for noise
decoupling. During shutdown, Channel 2 will follow Channel 1
R
VTT
0.6V
700mV
until both channels drops below 87%, at which point both
Internal SS
0.6V
channels enter UV protection zone. Depending on the loading,
Channel 1 might drop faster than Channel 2. To solve this race
FB2
E/A2
condition, Channel 2 can either power up from Channel 1 or
bridge the Channel 1 with a high current Schottky diode. If the
system requires to shutdown both channels when either has a
fault, tying EN/FF1 and EN/FF2 will do the job. In DDR mode,
Channel 1 delays 60° over Channel 2.
In Dual mode, depending upon the resistor divider level of
REFIN from VCC, the ISL8120 operates as a dual-PWM
controller for two independent regulators with a phase shift,
as shown in Table 2. The phase shift is latched as VCC
raises above POR and cannot be changed on the fly.
TABLE 2.
FIGURE 25. SIMPLIFIED DDR IMPLEMENTAION
Internal Reference and System Accuracy
The internal reference is set to 0.6V. Including bandgap
variation and offset of differential and error amplifiers, it has
an accuracy of ±0.6% over commercial temperature range,
and 0.9% over industrial temperature range. While the
remote sense is not used, its offset (V OS_DA ) should be
included in the tolerance calculation. Equations 9 and 10
show the worst case of system accuracy calculation.
V OS_DA should set to zero when the differential amplifier is
in the loop, the differential amplifier ’s input impedance
MODE
DDR
DECODING
REFIN RANGE
<29% of VCC
PHASE for CHANNEL REQUIRED
2 WRT CHANNEL 1 REFIN
-60° 0.6V
(R DIF ) is typically 500k Ω with a tolerance of 20% (RDIF%)
and can be neglected when R OS is less than 100 Ω . To set a
precision setpoint, R OS can be scaled by two paralleled
Dual
Dual
Dual
29% to 45% of VCC
45% to 62% of VCC
62% to VCC
0°
90°
180°
37% VCC
53% VCC
VCC
resistors.
F igure 26 shows the tolerance of various output voltage
regulation for 1%, 0.5%, and 0.1% feedback resistor
33
March 20, 2009
FN6641.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL8120IRZEC | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8120IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8120IRZ-TEC | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8120IRZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8121 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:3V to 20V, Two-Phase Buck PWM Controller with Integrated 4A MOSFET Drivers |
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