参数资料
| 型号： | SP6128ASEY-L |
| 厂商： | Exar Corporation |
| 文件页数： | 3/10页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 14TSSOP |
| 标准包装： | 94 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 90% |
| 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： | -40°C ~ 85°C |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 包装： | 管件 |
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: -40 ° C < T A < 85 ° C, 3.0V < PV CC = 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
SOFT START, SHUTDOWN, UVLO
Internal Soft Start Slew Rate
0.1
0.3
0.6
V/ms
COMP pin, on transition from
shutdown
COMP Discharge Current
183
μ A
COMP = 0.5V, Fault Initiated
COMP Clamp Voltage
COMP Clamp Current
Shutdown Threshold Voltage
Shutdown Input Pull-up Current
V CC Start Threshold
V CC Stop Threshold
0.55
10
0.29
2
2.63
2.47
0.65
30
0.34
5
2.8
2.7
0.75
65
0.39
10
2.95
2.9
V
μ A
V
μ A
V
V
V FB = 0.9V
COMP = 0.5V, V FB = 0.9V
Measured at COMP Pin
COMP = 0.2V, Measured at COMP pin
GATE DRIVERS
GH Rise Time
GH Fall Time
GL Rise Time
GL Fall Time
60
60
60
60
110
110
110
110
ns
ns
ns
ns
PV CC > 4.5V
PV CC > 4.5V
PV CC > 4.5V
PV CC > 4.5V
GH to GL Non-Overlap Time
GL to GH Non-Overlap Time
0
0
100
100
140
140
ns
ns
PV CC > 4.5V, measured at 2volt threshold
PV CC > 4.5V, measured at 2volt threshold
PIN DESCRIPTION
PIN N0.
1
2
3
4
5
6
7, 8, 9
10
11
12
13
14
PIN NAME
GL
PV CC
V CC
PGND
GND
COMP
NC
V FB
I SET
SWN
GH
BST
DESCRIPTION
High current driver output for the low side MOSFET switch. It is always low if GH is high.
GL swings from PGND to PV CC .
Positive input supply for the low side gate driver. It's recommended to tie the PV CC to the
V CC pin.
Positive input supply for the logic circuitry. Properly bypass this pin to GND with a low ESL/
ESR ceramic capacitor or RC filter.
Power ground pin.
Signal ground pin.
Output of the Error Amplifier. It is internally connected to the inverting input of the PWM
comparator. A lead-lag network is typically connected to the COMP pin to compensate 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. An internal 5 μ A pull-up ensures start-up.
No connect.
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.
Overcurrent program pin. A resistor programs the overcurrent threshold. The overcurrent
comparator sets the fault latch and terminates gate pulses when VI SET > V SWN and the high
side MOSFET is turned on. This prevents excessive power dissipation in the external
power MOSFETs during an overload condition. An internal delay circuit prevents false
shutdowns that might otherwise occur during very short, mild overload conditions,due to
load transients.
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.
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 on page 1.
Rev. 08/19/05
SP6128A Low Voltage, Synchronous Step Down PWM Controller
3
? Copyright 2005 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP6128ASEY-L/TR | 功能描述:开关变换器、稳压器与控制器 Low Voltage Synchronous Step Dwn RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| SP6128EB | 功能描述:电源管理IC开发工具 Eval Board for SP6128 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 |
| SP613 | 制造商:Power-One 功能描述: |
| SP6132 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Wide Input, 300KHz Synchronous PWM Controller |
| SP6132ACU | 制造商:Exar Corporation 功能描述:SMPS CONTROLLER |
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