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参数资料
| 型号： | ISL6263ACRZ |
| 厂商： | Intersil |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC VREG 5BIT 1PHASE 32-QFN |
| 标准包装： | 60 |
| 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： | 管件 |
ISL6263A
VDD
L OUT
DCR
OCP
?
+
10 μ A
+
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
I OC ? R droop
R OCSET = ----------------------------------
10.1 μ A
Smooth mode transitions are facilitated by the R 3 modulator
which correctly maintains the internally synthesized ripple
current information throughout mode transitions.
Power Monitor
The ISL6263A features an IMVP-6+ compliant power
monitor output. The voltage between the PMON and VSS
pins is proportional to the product of the regulated output
voltage and the output inductor current. The output voltage is
measured between the VSEN and VSS pins. The output
inductor current is proportional to the voltage between the
DROOP and VO pins. The PMON pin has source and sink
capability for close tracking of transient power events. The
power monitor output is expressed as Equation 1:
each. The ISL6263A protects against hard shorts by latching
an OCP fault within 2μs for overcurrent levels exceeding
2.5x the OCP threshold . The value of R OCSET is calculated
as Equation 2:
(EQ. 2)
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
V PMON = V SEN ? ( V DROOP – V O ) ? ( 17.5 )
(EQ. 1)
output voltage measured on the VO pin is greater than
195mV above the voltage on the SOFT pin for longer than
Protection
The ISL6263A 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
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
12
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 .
FN9284.3
July 8, 2010
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6263ACRZ-T | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263AEVAL1Z | 功能描述:EVAL BOARD FOR ISL6263A 1 32QFN RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6263AIRZ | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263AIRZ-T | 功能描述:直流/直流开关调节器 ONE-PHS INT DC/DC BUCK CNTRLR IMVP-6 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 |
| ISL6263B | 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 IMVP-6 Santa Rosa GPU Core |
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