参数资料
| 型号： | ISL6263BHRZ-T |
| 厂商： | Intersil |
| 文件页数： | 11/18页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC BUCK CTRLR 1PH 32-QFN |
| 标准包装： | 6,000 |
| 应用： | 转换器，Intel IMVP-6 |
| 输入电压： | 5 V ~ 25 V |
| 输出数： | 1 |
| 输出电压： | 0.41 V ~ 1.29 V |
| 工作温度： | -10°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 带卷 (TR) |
ISL6263B
VDD
L OUT
DCR
OCP
?
+
10μA
↓
+
DROOP
?
OCSET
VSUM
DFB
R OCSET
PHASE
R S
C OUT
ESR
+
+
Σ
+
?
DROOP
VO
VDIFF
+
?
VSEN
RTN
C FILTER1
R FILTER1
R FILTER2
TO
V CC_SNS PROCESSOR
SOCKET
V SS_SNS KELVIN
CONNECTIONS
C FILTER2
C FILTER3
FIGURE 5. SIMPLIFIED VOLTAGE DROOP CIRCUIT WITH GPU SOCKET KELVIN SENSING AND INDUCTOR DCR CURRENT SENSING
Smooth mode transitions are facilitated by the R 3 modulator
which correctly maintains the internally synthesized ripple
OCP threshold . The value of R OCSET is calculated in
Equation 2:
current information throughout mode transitions.
Current Monitor
10.1 μ A
I OC ? R droop
R OCSET = ----------------------------------
(EQ. 2)
V IMON = ( V DROOP – V O ) ? 31
The ISL6263B features a current monitor output. The
voltage between the IMON and VSS pins is proportional to
the output inductor current. The output inductor current is
proportional to the voltage between the DROOP and VO
pins. The IMON pin has source and sink capability for close
tracking of transient current events. The current monitor
output is expressed in Equation 1:
(EQ. 1)
Protection
The ISL6263B provides overcurrent protection (OCP),
overvoltage protection (OVP), and undervoltage protection
(UVP) as shown in Table 3.
Overcurrent protection is tied to the voltage droop, which is
determined by the resistors selected in the Static Droop
Design Using DCR Sensing section. After the load line is set,
the OCSET resistor can be selected. The OCP threshold
detector is checked every 15μs and will increment a counter
if the OCP threshold is exceeded, conversely the counter will
be decremented if the load current is below the OCP
threshold. The counter will latch an OCP fault when the
counter reaches eight. The fastest OCP response for
overcurrent levels that are no more than 2.5x the OCP
threshold is 120μs, which is eight counts at 15μs each. The
ISL6263B protects against hard shorts by latching an OCP
fault within 2μs for overcurrent levels exceeding 2.5x the
11
For example: The desired overcurrent trip level, I oc , is 30A,
R droop load-line is 8m Ω , Equation 2 gives R OCSET = 24k Ω .
Undervoltage protection is independent of the overcurrent
protection. If the output voltage measured on the VO pin is
less than +300mV below the voltage on the SOFT pin for
longer than 1ms, the controller will latch a UVP fault. If the
output voltage measured on the VO pin is greater than
195mV above the voltage on the SOFT pin for longer than
1ms, the controller will latch an OVP fault. Keep in mind that
V SOFT will equal the voltage level commanded by the VID
states only after the soft-start capacitor C SOFT has slewed to
the VID DAC output voltage. The UVP and OVP detection
circuits act on static and dynamic V SOFT voltage.
When an OCP, OVP, or UVP fault has been latched, PGOOD
becomes a low impedance and the gate driver outputs
UGATE and LGATE are pulled low. The energy stored in the
inductor is dissipated as current flows through the low-side
MOSFET body diode. The controller will remain latched in
the fault state until the VR_ON pin has been pulled below the
falling VR_ON threshold voltage V VR_ONL or until VDD has
gone below the falling POR threshold voltage VVDD_THF .
A severe-overvoltage protection fault occurs immediately
after the voltage between the VO and VSS pins exceed the
rising severe-overvoltage threshold V OVPS which is 1.545V,
the same reference voltage used by the VID DAC. The
FN6388.3
July 8, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6263C | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core Power |
| ISL6263CEVAL1 | 功能描述:EVAL BOARD 1 FOR ISL6263C RoHS:否 类别:编程器，开发系统 >> 评估板 - 线性稳压器 (LDO) 系列:* 产品变化通告:1Q2012 Discontinuation 30/Mar/2012 设计资源:NCP590MNDPTAGEVB Gerber Files 标准包装:1 系列:- 每 IC 通道数:2 - 双 输出电压:1.8V，2.8V 电流 - 输出:300mA 输入电压:2.1 ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 已供物品:板 已用 IC / 零件:NCP590MNDP 其它名称:NCP590MNDPTAGEVB-NDNCP590MNDPTAGEVBOS |
| ISL6263CHRZ | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP-6 W/IMON 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 |
| ISL6263CHRZ-T | 功能描述:直流/直流开关调节器 1-PHS INT DC/DC BUCK CNTRLR IMVP-6 W/IMON 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 |
| ISL6263CRZ | 功能描述:直流/直流开关调节器 1 PHS INT DC/DC BUCK CNTRLR FOR INTEL 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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