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参数资料
| 型号： | LM2621EVAL |
| 厂商： | National Semiconductor |
| 文件页数： | 3/17页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR LM2621 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 1，非隔离 |
| 输入电压： | 1.2 ~ 14 V |
| 稳压器拓扑结构： | 升压 |
| 板类型： | 完全填充 |
| 已供物品： | 板，文档 |
| 已用 IC / 零件： | LM2621 |
| 相关产品： | LM2621MMDKR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMX/NOPBTR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMTR-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP LM2621MMCT-ND - IC REG BST FLYBK SEPIC ADJ 8MSOP |
| 其它名称： | *LM2621EVAL |
SNVS033C – MAY 2004 – REVISED MARCH 2005
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for T J = 25°C, and limits in boldface type apply over the full operating temperature range of
? 40°C to +85°C. Unless otherwise specified: V DD = V OUT = 3.3V.
Symbol
V IN_ST
V IN_OP
Parameter
Minimum Start-Up Supply Voltage (1)
Minimum Operating Supply Voltage
Condition
I LOAD = 0mA
I LOAD = 0mA
Typ
1.1
0.65
Min
Max
1.2
Units
V
V
(once started)
V FB
V OUT_M
FB Pin Voltage
Maximum Output Voltage
1.24
14
1.2028
1.2772
V
V
AX
V HYST
Hysteresis Voltage (2)
30
45
mV
η
Efficiency
V IN = 3.6V; V OUT = 5V; I LOAD = 500mA
V IN = 2.5V; V OUT = 3.3V; I LOAD = 200mA
87
87
%
D
Switch Duty Cycle
70
60
80
%
I DD
I SD
Operating Quiescent Current (3)
Shutdown Quiescent Current (2)
FB Pin > 1.3V; EN Pin at V DD
V DD , BOOT and SW Pins at 5.0V;
80
0.01
110
2.5
μA
μA
EN Pin <200mV
I CL
R DS_ON
Switch Peak Current Limit
MOSFET Switch On Resistance
2.85
0.17
A
Ω
Enable Section
V EN_LO
V EN_HI
EN Pin Voltage Low (4)
EN Pin Voltage High (4)
0.7V DD
0.15V DD
V
V
(1)
(2)
(3)
(4)
Output in regulation, V OUT = V OUT (NOMINAL ) ± 5%
This is the total current into pins V DD , BOOT, SW and FREQ.
This is the current into the V DD pin.
When the EN pin is below V EN_LO , the regulator is shut down; when it is above V EN_HI , the regulator is operating.
PIN DESCRIPTION
Pin
1
2
3
4
5
6
7
8
Name
PGND
EN
FREQ
FB
SGND
V DD
BOOT
SW
Function
Power Ground
Active-Low Shutdown Input
Frequency Adjust. An external resistor connected between this pin and Pin 6 (V DD ) sets the switching
frequency of the LM2621.
Output Voltage Feedback
Signal Ground
Power Supply for Internal Circuitry
Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch
Drain of the Internal MOSFET Power Switch
Copyright ? 2004–2005, Texas Instruments Incorporated
Product Folder Links: LM2621
3
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相关代理商/技术参数 |
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| LM2621EVAL/NOPB | 功能描述:电源管理IC开发工具 EVAL BOARDFOR LM2621 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 |
| LM2621MM | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2621MM | 制造商:Texas Instruments 功能描述:DC/DC UP CONVERTER ADJ SMD 2621 |
| LM2621MM/NOPB | 功能描述:DC/DC 开关控制器 LOW INP VLTG,STEP-UP DC-DC RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| LM2621MM/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
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