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参数资料
| 型号： | MAX1956ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 660kHz |
| 占空比： | 97% |
| 电源电压： | 1.6 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： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
ABSOLUTE MAXIMUM RATINGS
IN, AVDD, SYNC, EN, ILIM_, FB_, SEQ to GND.......-0.3V to +6V
COMP_, REF to GND..............................-0.3V to (V AVDD + 0.3V)
LXB to GND ..............................................-0.3V to (V VDD + 0.3V)
DL_ to GND ...............................(V PGND - 0.3V) to (V VDD + 0.3V)
BST_ to GND ..........................................................-0.3V to +12V
DH1 to LX1 ...............................................-0.3V to (BST1 + 0.3V)
DH2 to LX2 ...............................................-0.3V to (BST2 + 0.3V)
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
PGND to GND or VDD to AVDD ............................-0.3V to +0.3V
REF Short-Circuit to GND...........................................Continuous
I VDD ...................................................................................250mA
Continuous Power Dissipation* (T A = +70 ° C)
28-Lead Thin QFN
(derate 20.8mW/ ° C above +70 ° C)................................1667mW
Operating Temperature Range ...........................-40 ° C to +85 ° C
Junction Temperature ......................................................+150 ° C
Storage Temperature Range .............................-65 ° C to +150 ° C
Lead Temperature (soldering 10s) ..................................+300 ° C
* Exposed pad soldered to PC board.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V IN = V EN = 3.3V; V VDD = V AVDD = 5V; V PGND = V GND = 0; C REF = 0.22μF; SEQ = SYNC = GND; T A = 0 ° C to +85 ° C , unless other-
wise noted. Typical values are at T A = +25 ° C.)
PARAMETER
IN Input Voltage Range
MAX1955
MAX1956 (Note 1)
CONDITIONS
MIN
2.25
1.6
TYP
MAX
5.50
5.5
UNITS
V
IN Input Voltage UVLO
FB Regulation Voltage
Rise or fall
MAX1955, hysteresis = 35mV
MAX1956, hysteresis = 30mV
1.9
1.30
0.796
0.8
2.2
1.58
0.804
V
V
FB Regulation Voltage with
Positive Voltage Margining
FB Regulation Voltage with
Negative Voltage Margining
Line Regulation Error
Feedback Input Bias
Feedback Transconductance
Percentage change from nominal regulation voltage
Percentage change from nominal regulation voltage
Note 2
3
-5
-0.2
1
4
-4
0.1
2
5
-3
0.3
+0.2
3
%
%
%
μA
mS
COMP Source Current
COMP Sink Current
COMP Pulldown Resistance
Output Soft-Start Time
In shutdown
100
100
150
150
4.27
100
μA
μA
?
ms
Step-Down Switching Frequency
SYNC Frequency Range
Maximum Duty Cycle
Minimum Duty Cycle
SYNC = GND (Note 3)
2 times step-down switching frequency
Measured at DH_
Measured at DH_
540
1080
90
600
93
7
660
1320
97
10
kHz
kHz
%
%
2
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相关代理商/技术参数 |
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| MAX1957EUB | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB+ | 功能描述:电流型 PWM 控制器 High-f Current-Mode PWM Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB+T | 功能描述:电流型 PWM 控制器 High-f Current-Mode PWM Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX19586ETN | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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