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| 型号： | MAX1626ESA-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 300kHz |
| 占空比： | 100% |
| 电源电压： | 3 V ~ 16.5 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
INPUT
INPUT
C2
68 μ F LOW-ESR
TANTALUM
C3
68 μ F LOW-ESR
TANTALUM
C5
0.47 μ F
C2
68 μ F LOW-ESR
TANTALUM
C3
0.47 μ F
V+
V+
ADJUSTABLE
22 μ H, 3A
GND
68 μ H, 0.7A
N.C.
C4
0.1 μ F
MAX1627
OUT
SHDN
REF
GND FB
R3
CS
EXT
R2
P
R SENSE
0.15 ?
U1
LOGIC-LEVEL MOSFET
L1
OUTPUT
C1
D1 220 μ F
LOW-ESR
TANTALUM
C4
0.1 μ F
MAX1626
3/5
SHDN
REF
CS
EXT
OUT
D1
P
R SENSE
0.15 ?
U1
LOGIC-LEVEL MOSFET
L1
OUTPUT
C1
100 μ F
LOW-ESR
TANTALUM
C R2
L1: SUMIDA CDRH125-220
D1: NIHON NSQ03A03
U1: MOTOROLA MMSF3P02HD
L1: SUMIDA CDR1053-680
D1: MOTOROLA MBRS130T3
U1: MOTOROLA MMSF3P02HD
Figure 8. MAX1627 Typical Operating Circuit
________________________Applications
Figure 9. 0.5A Step-Down Converter
INPUT 3V TO 6V
The MAX1626/MAX1627 typical operating circuits
(Figures 1 and 8) are designed to output 2A at a 5V
output voltage. The following circuits provide examples
C4
100 μ F
C5
100 μ F
and guidance for other applications.
C6
0.1 μ F
C7
0.1 μ F
C8
1.0 μ F
C9
1.0 μ F
Micropower Step-Down Converter
When designing a low-power, battery-based applica-
V+
tion, choose an external MOSFET with low gate capaci-
tance (to minimize switching losses), and use a low
MAX1627
R CS1 , R CS2
0.025 ?
peak current limit to reduce I 2 R losses. The circuit in
N.C.
OUT
CS
Figure 9 is optimized for 0.5A.
High-Current Step-Down Converter
The circuit in Figure 10 outputs 6A at 2.5V from a 5V or
3.3V input. High-current design is difficult, and board
layout is critical due to radiated noise, switching tran-
C10
0.1 μ F
SHDN
REF
GND
EXT
FB
P
Q1
LOGIC-LEVEL MOSFET
L1
2.7 μ H >8A
D1
OUTPUT
2.5V, 6A
sients, and voltage gradients on the PC board traces.
Figure 11 is a recommended PC board design. Choose
the external MOSFET to minimize R DS(ON) . Keep the
gate-charge factor below the MAX1626/MAX1627 ’s
drive capability (see Ext Rise and Fall Times vs.
Capacitance graph in the Typical Operating
Characteristics). Otherwise, increased MOSFET rise
and fall times will contribute to efficiency losses. For
R3
21.5k, 1%
R2
20k, 1%
C R2
220pF
C1 C2 C3
220 μ F 220 μ F 220 μ F
C1–C3: SANYO OS-CON 220 μ F, 6.3V
C4, C5: SANYO OS-CON 100 μ F, 20V
RCS1, RCS2: 0.025 ? DALE WSL-2512
Q1: MOTOROLA MTB50PO3HDL
higher efficiencies, especially at low output voltages,
the MAX796 family of step-down controllers with syn-
chronous rectification is recommended.
D1: NIEC C10T04Q
L1: SUMIDA CDRH127-2R7NC
Figure 10. 6A Step-Down Converter
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1626EVKIT | 功能描述:DC/DC 开关控制器 3V/3.3V 100% Duty-Cycle High-Efficiency Step-Down DC-DC Controller 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 |
| MAX1626EVKIT-SO | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1626 MAX1627 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 |
| MAX1627ESA | 功能描述:DC/DC 开关控制器 5/3.3V or Adjustable 100% Duty Cycle 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 |
| MAX1627ESA+ | 功能描述:DC/DC 开关控制器 5/3.3V or Adjustable 100% Duty Cycle 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 |
| MAX1627ESA+ | 制造商:Maxim Integrated Products 功能描述:CONTROLLER STEP DOWN DC-DC 1627 制造商:Maxim Integrated Products 功能描述:CONTROLLER, STEP DOWN, DC-DC, 1627 |
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