- 您现在的位置：买卖IC网 > PDF目录15147 > MAX772CSA+ (Maxim Integrated Products)IC REG CTRLR BST PWM 8-SOIC PDF资料下载
参数资料
| 型号： | MAX772CSA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 300kHz |
| 占空比： | 90% |
| 电源电压： | 3 V ~ 16.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 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 |
5V/12V/15V or Adjustable, High-Efficiency,
Low I Q , Step-Up DC-DC Controllers
Table 1. Bootstrapped vs. Non-Bootstrapped Operation
PARAMETER
Gate Drive
FET On Resistance
Gate-Drive Capacitive Losses
No-Load Supply Current
Possible Input Voltage Range
Normally Recommended Input
Voltage Range
Fixed Output Available
Adjustable Output Available
BOOTSTRAPPED*
GND to V OUT
Lower
Higher
Higher
2V to 16.5V (MAX770/MAX771/MAX772),
(internal feedback resistors)
3V to 16.5V (MAX770/MAX771/MAX772),
(external feedback resistors)
3V to 16.5V (MAX773)
2V to 5V (MAX770/MAX771/MAX772),
3V to 5V (MAX773)
MAX770–MAX773(N)
MAX770–MAX773(N)
NON-BOOTSTRAPPED
GND to V+
Higher
Lower
Lower
3V to 16.5V
(MAX770/MAX771/MAX772),
3V and up (MAX773)
5V to 16.5V
(MAX770/MAX771/MAX772),
5V and up (MAX773)
MAX773(N)/MAX773(S)
MAX770/MAX771/MAX772/
MAX773(N)/MAX773(S)
*MAX773(S) indicates shunt mode; MAX773(N) indicates NOT in shunt mode.
Use an N-channel FET as the power switch when using
the shunt regulator (see MAX773 Shunt-Regulator
V IN
Operation in the Detailed Description). The shunt-regu-
lator current powers the MAX773 and also provides the
FET gate-drive current, which depends largely on the
R SHUNT
C2
0.1 μ F
C1
FET’s total gate charge at V GS = 5V. To determine the
shunt-resistor value, first determine the maximum shunt
current required.
I SHUNT = I SUPP + I GATE
3
V+
SGND
EXTH
10
13
NPN
2N2222A
L1
20 μ H
D1
V OUT
See N-Channel MOSFETs in the Power-Transistor
Selection section to determine I GATE .
Determine the shunt-resistor value using the following
equation:
MAX773
EXTL
12
100 ?
PNP
2N2907A
N
R2
C4
V IN (min) - V SHUNT (max)
R SHUNT (max) = ————————————
I SHUNT
where V SHUNT (max) is 6.3V.
The shunt regulator is not disabled in shutdown
CS
FB
11
6
R SENSE
R1
mode, and continues to draw the calculated shunt
current.
If the calculated shunt regulator current exceeds 20mA,
or if the shunt current exceeds 5mA and less shunt reg-
ulator current is desired, use the circuit of Figure 6 to
provide increased drive and reduced shunt current
when driving N-FETs with large gate capacitances.
Select I SHUNT = 3mA. This provides adequate biasing
current for this circuit, although higher shunt currents
can be used.
Figure 6. Increased N-FET Gate Drive when Using the Shunt
Regulator
To prevent the shunt regulator from drawing current in
shutdown mode, place a switch in series with the shunt
resistor.
14
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| ISL88013IH531Z-TK | IC VOLTAGE MONITOR DUAL SOT23-5 |
| MAX608ESA+T | IC REG CTRLR BST PWM 8-SOIC |
| MAX608EPA+ | IC REG CTRLR BST PWM 8-PDIP |
| MAX1651CSA+T | IC REG CTRLR BUCK PWM 8-SOIC |
| MAX1649CSA+T | IC REG CTRLR BUCK PWM 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX772CSA+ | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up 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 |
| MAX772CSA+T | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up 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 |
| MAX772CSA-T | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up 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 |
| MAX772EPA | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up 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 |
| MAX772ESA | 功能描述:DC/DC 开关控制器 5/12/15/AdjV Step Up 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 |
发布紧急采购，3分钟左右您将得到回复。