参数资料
| 型号： | SP6123CN-L |
| 厂商： | Exar Corporation |
| 文件页数： | 3/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 8NSOIC |
| 标准包装： | 98 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 93% |
| 电源电压： | 3 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: 0 ° C < T A < 70 ° C, 3.0V < V CC < 5.5V, C COMP = 22nF, CGH = CGL = 3.3nF, V FB = 0.8V,
SWN = GND=0V, typical value for design guideline only.
PARAMETER
MIN TYP
MAX UNITS
CONDITIONS
GATE DRIVERS
GH Rise Time
GH Fall Time
GL Rise Time
GL Fall Time
GH to GL Non-Overlap Time
GL to GH Non-Overlap Time
100
100
110
110
110
110
ns
ns
ns
ns
ns
ns
V CC > 4.5V
V CC > 4.5V
V CC > 4.5V
V CC > 4.5V
V CC > 4.5V
V CC > 4.5V
PIN DESCRIPTION
PIN N0. PIN NAME DESCRIPTION
1
2
3
4
5
6
7
8
GL
V CC
GND
COMP
V FB
SWN
GH
BST
High current driver output for the low side MOSFET switch. It is always low if GH is high.
GL swings from GND to V CC .
Positive input supply for the control circuitry and the low side gate driver. Properly bypass
this pin to GND with a low ESL/ESR ceramic capacitor.
Ground pin. Both power and control circuitry of the IC is referenced to this pin.
Output of the Error Amplifier. It is internally connected to the non-inverting input of the
PWM comparator. A lead-lag network is typically connected to the COMP pinto compen-
sate the feedback loop in order to optimize the dynamic performance of the voltage mode
control loop. Sleep mode can be invoked by pulling the COMP pin below 0.3V with an
external open-drain or open-collector transistor. Supply current is reduced to 30 μ A (typical)
in shutdown. An internal 5 μ A pull-up ensures start-up.
Feedback Voltage Pin. It is the inverting input of the Error Amplifier and serves as the
output voltage feedback point for the Buck converter. The output voltage is sensed and
can be adjusted through an external resistor divider.
Lower supply rail for the GH high-side gate driver. It also connects to the Current Limit
comparator. Connect this pin to the switching node at the junction between the two
external power MOSFET transistors. This pin monitors the voltage drop across the R DS(ON)
of the high side N-channel MOSFET while it is conducting. When this drop exceeds the
internal 200mV threshold, the overcurrent comparator sets the fault latch and terminates
the output pulses. The controller stops switching and goes through a hiccup sequence. This
prevents excessive power dissipation in the external power MOSFETS during an overload
condition. An internal delay circuit prevents that very short and mild overload conditions,
that could occur during a load transient, from activating the current limit circuit.
High current driver output for the high side MOSFET switch. It is always low if GL is high or
during a fault. GH swings from SWN to BST.
High side driver supply pin. Connect BST to the external boost diode and capacitor as
shown in the application schematic of page #1. Voltage between BST and SWN should
not exceed 5.5V.
Date: 9/13/04
SP6123 Low Voltage, Synchronous Step Down PWM Controller
3
? Copyright 2004 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6123CN-L/TR | 功能描述:电压模式 PWM 控制器 Low Voltage, Micro 8 Synchronous, Cntrllr RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| SP6123EB | 功能描述:电源管理IC开发工具 Low Voltage, 8 Pin Sync Buck Controller RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| SP6123EN-L | 制造商:Exar Corporation 功能描述:IC BUCK CONTROLLER LOW VOLT 300KHZ |
| SP6125 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High-Voltage, Step Down Controller in TSOT6 |
| SP6125EB | 功能描述:电源管理IC开发工具 Eval Board for SP6125 Series RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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