参数资料
| 型号： | ISL6262CRZ-T |
| 厂商： | Intersil |
| 文件页数： | 20/27页 |
| 文件大小： | 0K |
| 描述： | IC CORE REG 2PHASE 48-QFN |
| 标准包装： | 4,000 |
| 应用： | 转换器，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： | -10°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： | 带卷 (TR) |
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ISL6262
ISEN1
ISEN1
ISEN2
ISEN2
OC
-
+
10μA
OCSET
R OCSET
VO'
I PHASE1
L1
+
Vdcr 1
-
INTERNAL TO
ISL6262
+
DROOP
-
VSUM
DFB
VSUM
R SERIES
VSUM
RS
R L1
C L1
DCR
RO1
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
82nF
0.018μF
R OPN2
0.018μF
10
R opn1
VCC_SENSE
VSS_SENSE
TO V OUT
TO PROCESSOR
SOCKET KELVIN
CONNECTIONS
ESR
FIGURE 31. 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 changes in input and output voltage
and output current, but this variation is normally less than
10% in continuous conduction mode.
Refer to Figure 26, the resistor connected between the VW
and COMP pins of the ISL6262 adjusts the switching
window, and therefore adjusts the switching frequency. The
R FSET resistor that sets up the switching frequency of the
converter operating in CCM can be determined using the
following relationship, where R FSET is in k Ω and the
which senses the voltage change across an externally
placed negative temperature coefficient (NTC) thermistor.
Proper selection and placement of the NTC thermistor
allows for detection of a designated temperature rise by the
system.
Figure 32 shows the thermal throttling feature with
hysteresis. At low temperature, SW1 is on and SW2
connects to the 1.18V side. The total current going into NTC
pin is 60μA. The voltage on NTC pin is higher than threshold
voltage of 1.18V and the comparator output is low. VR_TT#
is pulling up high by the external resistor.
switching period is in μs. Place a 47pF capacitor in parallel
with the frequency set resistor for better noise immunity.
54μA
6μA
R FSET ( k Ω ) ? ( period ( μ s ) – 0.5 ) ? 1.56
(EQ. 4)
SW1
VR_TT#
NTC
In discontinuous conduction mode (DCM), the ISL6262 runs
-
in period stretching mode. The switching frequency is
dependent on the load current level. In general, the lighter
+
V NTC
-
R NTC
+
load, the slower 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.
R s
1.20V
SW2
1.18V
INTERNAL TO
ISL6262
Voltage Regulator Thermal Throttling
lntel? IMVP-6 technology supports thermal throttling of the
processor to prevent catastrophic thermal damage to the
voltage regulator. The ISL6262 features a thermal monitor
20
FIGURE 32. CIRCUITRY ASSOCIATED WITH THE THERMAL
THROTTLING FEATURE IN ISL6262
FN9199.2
May 15, 2006
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ISL6262CRZ-TR5242 | 制造商:Intersil Corporation 功能描述:53350B01 MASK ONLY AND DOT ON BRAND - Tape and Reel |
| ISL6262IRZ | 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 |
| ISL6262IRZ-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 |
| ISL6263 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:5-Bit VID Single-Phase Voltage Regulator for IMVP-6 Santa Rosa GPU Core |
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