参数资料
| 型号： | ISL6262AIRZ |
| 厂商： | Intersil |
| 文件页数： | 21/28页 |
| 文件大小： | 0K |
| 描述： | IC CORE CTRLR 2PHASE 48-QFN |
| 标准包装： | 43 |
| 应用： | 控制器，Intel IMVP-6 |
| 输入电压： | 5 V ~ 25 V |
| 输出数： | 1 |
| 输出电压： | 0.3 V ~ 1.5 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 管件 |
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ISL6262A
ISEN1
ISEN1
ISEN2
ISEN2
OC
-
+
10μA
OCSET
R OCSET
VO'
I PHASE1
L1
+
Vdcr 1
-
INTERNAL TO
ISL6262A
+
DROOP
-
VSUM
DFB
VSUM
R SERIES
VSUM
R S
R L1
C L1
DCR
R O1
VDIFF
+
+
+
1 -
+
1 -
RTN
VSEN
DROOP
VO'
R drp2
Cn
R drp1
R NTC
R PAR
VO'
I PHASE2
RS
VSUM
ISEN1
L 2
R L2
ISEN2
VO'
DCR
+ -
Vdcr 2
C L2
VO'
R O2
V OUT
C BULK
330pF
0.01μF
330pF
R opn1
VCC_SENSE
TO V OUT
TO PROCESSOR
ESR
R OPN2
VSS_SENSE
SOCKET KELVIN
CONNECTIONS
FIGURE 37. SIMPLIFIED SCHEMATIC FOR DROOP AND DIE SENSING WITH INDUCTOR DCR CURRENT SENSING
Setting the Switching Frequency - FSET
The R 3 modulator scheme is not a fixed frequency PWM
architecture. The switching frequency can increase during
the application of a load to improve transient performance.
It also varies slightly due to changes in input and output
voltage and output current, but this variation is normally less
than 10% in continuous conduction mode.
The resistor connected between the VW and COMP pins of
the ISL6262A adjusts the switching window, and therefore
Proper selection and placement of the NTC thermistor
allows for detection of a designated temperature rise by the
system.
Figure 38 shows the thermal throttling feature with
hysteresis. At low temperature, SW1 is on and SW2
connects to the 1.2V side. The total current going into NTC
pin is 60μA. The voltage on the NTC pin is higher than the
threshold voltage of 1.2V and the comparator output is low.
VR_TT# is pulling up high by the external resistor.
adjusts the switching frequency (Figure 32). The R FSET
resistor that sets up the switching frequency of the converter
operating in CCM can be determined using Equation 4,
54μA
6μA
R FSET ( k Ω ) = ( period ( μ s ) – 0.29 ) ? 2.33
where R FSET is in k Ω and the switching period is in μs.
(EQ. 4)
NTC
SW1
-
VR_TT#
For 300kHz operation, R fset is suggested to be 6.81k Ω. In
discontinuous conduction mode (DCM), the ISL6262A runs in
+
V NTC
-
R NTC
+
period stretching mode. The switching frequency is dependent
on the load current level. In general, the lighter load, the slower
R s
1.24V
SW2
switching frequency. Therefore, the switching loss is much
reduced for the light load operation, which is important for
conserving the battery power in the portable application.
Voltage Regulator Thermal Throttling
lntel? IMVP-6+ technology supports thermal throttling of the
processor to prevent catastrophic thermal damage to the
voltage regulator. The ISL6262A features a thermal monitor
that senses the voltage change across an externally placed
negative temperature coefficient (NTC) thermistor.
21
1.20V
INTERNAL TO
ISL6262A
FIGURE 38. CIRCUITRY ASSOCIATED WITH THE THERMAL
THROTTLING FEATURE IN ISL6262A
When the temperature increases, the NTC resistor value on
the NTC pin decreases. Thus, the voltage on the NTC pin
decreases to a level lower than 1.2V. The comparator output
changes polarity and turns SW1 off and connects SW2 to
1.24V. This pulls VR_TT# low and sends the signal to start
thermal throttle. There is a 6μA current reduction on the NTC
FN6343.1
December 23, 2008
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6262IRZ | IC CORE CTRLR 2PHASE 48-QFN |
| ISL6263AIRZ | IC PWN CTRLR SYNC BUCK 32QFN |
| ISL6263BHRZ | IC DC/DC BUCK CTRLR 1PH 32-QFN |
| ISL6263CHRZ-T | IC VOLT REG 1PH 5BIT VID 32-QFN |
| ISL6263CRZ | IC VREG CORE 5BIT 1PHASE 32-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6262AIRZ-T | 功能描述:IC CORE CTRLR 2PHASE 48-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| ISL6262CRZ | 功能描述:直流/直流开关调节器 TWO-PHS DC/DC BUCK CNTRLR IMVP-6 4 8LD RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL6262CRZR5242 | 制造商:Intersil Corporation 功能描述:53350B01 MASK ONLY AND DOT ON BRAND - Rail/Tube |
| ISL6262CRZ-T | 功能描述:直流/直流开关调节器 TWO-PHS DC/DC BUCK CNTRLR IMVP-6 4 8LD RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL6262CRZ-TK | 功能描述:直流/直流开关调节器 TWO-PHS DC/DC BUCK CNTRLR IMVP-6 4 8LD RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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