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| 型号： | ADM1275-1ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/48页 |
| 文件大小： | 0K |
| 描述： | IC HOT SWAP CTRL PMBUS 20LFCSP |
| 标准包装： | 1 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电流限制： | 可调 |
| 电源电压： | 2.95 V ~ 20 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-WQ（5x5） |
| 包装： | 托盘 |
| 配用： | EVAL-ADM1275EBZ-ND - BOARD EVALUATION FOR ADM1275 |
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Data Sheet
ADM1275
VCC
UV
VCAP
1
2
3
16 SENSE+
15 SENSE–
14 GATE
ISET
SS
TIMER
ADR
4
5
6
7
ADM1275-2
TOP VIEW
(Not to Scale)
13 GND
12 FLB
11 PWRGD
10 SCL
GPO1/ALERT1/CONV
8
9
SDA
Figure 5. ADM1275 -2 Pin Configuration
Table 6. ADM1275 -2 Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Mnemonic
VCC
UV
VCAP
ISET
SS
TIMER
ADR
GPO1/ALERT1/CONV
SDA
SCL
PWRGD
FLB
GND
GATE
SENSE?
SENSE+
Description
Positive Supply Input Pin. An undervoltage lockout (UVLO) circuit resets the device when a low
supply voltage is detected. GATE is held low when the supply is below UVLO. During normal
operation, this pin should remain greater than or equal to SENSE+ to ensure that specifications
are adhered to. No sequencing is required.
Undervoltage Input Pin. An external resistor divider is used from the supply to this pin to allow
an internal comparator to detect whether the supply is under the UV limit.
Internal Regulated Supply. A capacitor with a value of 1 μF or greater should be placed on this pin
to maintain good accuracy. This pin can be used as a reference to program the ISET pin voltage.
This pin allows the current limit threshold to be programmed. The default limit is set when this
pin is connected directly to VCAP. To achieve a user-defined sense voltage, the current limit can
be adjusted using a resistor divider from VCAP. An external reference can also be used.
Soft Start Pin. A capacitor is used on this pin to set the soft start ramp profile. The voltage on the
SS pin controls the current sense voltage limit, which controls the inrush current profile.
Timer Pin. An external capacitor, C TIMER , sets an initial timing cycle delay and a fault delay. The
GATE pin is pulled low when the voltage on the TIMER pin exceeds the upper threshold.
PMBus Address Pin. This pin can be tied to GND, tied to VCAP, left floating, or tied low through a
resistor to set four different PMBus addresses (see the Device Addressing section).
General-Purpose Digital Output (GPO1).
Alert (ALERT1). This pin can be configured to generate an alert signal when one or more fault or
warning conditions are detected.
Conversion (CONV). This pin can be used as an input signal to control when a power monitor
ADC sampling cycle begins.
At power-up, this pin defaults to a high impedance state. There is no internal pull-up on this pin.
Serial Data Input/Output Pin. Open-drain input/output. Requires an external resistive pull-up.
Serial Clock Pin. Open-drain input. Requires an external resistive pull-up.
Power-Good Signal. Used to indicate that the supply is within tolerance. This signal is based on
the voltage present on the FLB pin.
Foldback Pin. A foldback resistor divider is placed from the source of the FET to this pin. Foldback
is used to reduce the current limit when the source voltage drops. The foldback feature ensures
that the power through the FET is not increased beyond the SOA limits.
Chip Ground Pin.
Gate Output Pin. This pin is the high-side gate drive of an external N-channel FET. This pin is
driven by the FET drive controller, which uses a charge pump to provide a pull-up current to
charge the FET gate pin. The FET drive controller regulates to a maximum load current by
regulating the GATE pin. GATE is held low when the supply is below UVLO.
Negative Current Sense Input Pin. A sense resistor between the SENSE+ pin and the SENSE? pin
sets the analog current limit. The hot-swap operation of the ADM1275 controls the external FET
gate to maintain the sense voltage (V SENSE+ ? V SENSE? ). This pin also connects to the FET drain pin.
Positive Current Sense Input Pin. This pin connects to the main supply input. A sense resistor
between the SENSE+ pin and the SENSE? pin sets the analog current limit. The hot-swap operation
of the ADM1275 controls the external FET gate to maintain the sense voltage (V SENSE+ ? V SENSE? ).
This pin is also used to measure the supply input voltage using the ADC.
Rev. D | Page 11 of 48
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| ADM1275-1ACPZ-R7 | 功能描述:IC HOT SWAP CTRL PMBUS 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| ADM1275-1ARQZ | 功能描述:IC HOT SWAP CTRL PMBUS 20QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| ADM1275-1ARQZ-R7 | 功能描述:IC HOT SWAP CTRL PMBUS 20QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| ADM1275-2ARQZ | 功能描述:IC HOT SWAP CTRL PMBUS 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| ADM1275-2ARQZ-R7 | 功能描述:IC HOT SWAP CTRL PMBUS 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
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