参数资料
型号: MAX8810AETM+
厂商: Maxim Integrated Products
文件页数: 14/50页
文件大小: 0K
描述: IC CNTRLR PWM W/MOSFET 48TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
应用: 控制器,Intel VR10、VR11
输入电压: 4.5 V ~ 5.5 V
输出数: 1
输出电压: 0.5 V ~ 1.6 V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-WFQFN 裸露焊盘
供应商设备封装: 48-TQFN-EP(6x6)
包装: 管件
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM
Controllers with Integrated Dual MOSFET Drivers
Pin Description (continued)
PIN
MAX8809A MAX8810A
NAME
FUNCTION
Internal Clock Oscillator Frequency Set Input. Connect a resistor from OSC to GND to set
9
11
OSC
the internal oscillator frequency. See the Setting the Switching Frequency section for
determining the resistor value.
Soft-Start Program Input and Overvoltage-Protection Fault Flag. Connect a resistor from
10
12
SS/OVP
SS/OVP to GND to set the soft-start period. SS/OVP pulls to V CC during an OVP event to
signal the fault condition. See the Soft-Start section for determining the resistor value.
Temperature Comparator Program Input. Connect a resistor from VRTSET to GND to set
11
13
VRTSET
the VRHOT temperature threshold. Connect VRTSET to V CC to disable the VRHOT
monitoring feature. See the Temperature Monitoring (VRTSET, VRHOT) section for
resistor selection.
Temperature-Sensing Input. Connect a 10k Ω NTC thermistor between NTC and GND for
12
14
NTC
load-line independent temperature compensation. Connect NTC to V CC to disable the
temperature compensation and VRHOT monitoring features. See the Temperature
Monitoring (VRTSET, VRHOT) section for more details on selection of the NTC device.
13
CS3-
Phase 3 Current-Sense Negative Input. Connect to the load side of the output current-
sensing element.
Phase 3 Current-Sense Positive Input. Connect CS3+ to the positive side of the output
14
17
CS3+
current-sense resistor, or the positive side of the filtering capacitor if inductor DCR
current sensing is used.
Phase 2 Current-Sense Positive Input. Connect CS2+ to the positive side of the output
15
18
CS2+
current-sense resistor, or the positive side of the filtering capacitor if inductor DCR
current sensing is used.
16
19
CS12-
Phases 1 and 2 Current-Sense Common Negative Input. Connect to the load side of the
output current-sensing elements.
Phase 1 Current-Sense Positive Input. Connect CS1+ to the positive side of the output
17
20
CS1+
current-sense resistor, or the positive side of the filtering capacitor if inductor DCR
current sensing is used.
Enable Input. Drive EN high to enable the IC. Drive EN low to place the IC in shutdown
18
19
21
23
EN
PWM3
mode. If V CC is greater than the UVLO threshold, EN is internally pulled to V CC with a
100k Ω resistor. If V CC is less than the UVLO threshold, EN is internally pulled to GND
with a 2k Ω resistor.
PWM Signal Output for phase 3. PWM3 is low during shutdown, UVLO, and OVP faults.
Connect PWM3 to V CC to enable 2-phase operation.
Temperature Fault Flag. VRHOT is an active-high, open-drain output that goes high
20
24
VRHOT
impedance when the temperature sensed by the thermistor at NTC exceeds the
temperature threshold programmed at VRTSET.
21
22
25
26
DH1
LX1
Phase 1 High-Side MOSFET Gate-Drive Output. Connect to the gate of the high-side
MOSFET for phase 1. DH1 is pulled low during shutdown, UVLO, and OVP faults.
Phase 1 Inductor Sense Point. Connect LX1 to the switched side of the inductor for
phase 1.
14
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