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参数资料
| 型号： | MAX1901ETJ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 500kHz Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers |
| 中文描述： | 0.2 A DUAL SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, QCC32 |
| 封装： | 5 X 5 MM, 0.80 MM, MO-220WHHD-2, TQFN-32 |
| 文件页数： | 9/33页 |
| 文件大小： | 649K |
| 代理商： | MAX1901ETJ |
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M
500kHz Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
_______________________________________________________________________________________
9
Pin Description
PIN
SSOP
1
2
QFN
29
30
NAME
FUNCTION
CSH3
CSL3
Current-Sense Input for the 3.3V SMPS. Current-limit level is 100mV referred to CSL3.
Current-Sense Input. Also serves as the feedback input in fixed-output mode.
3
31
FB3
Feedback Input for the 3.3V SMPS. Regulates at FB3 = REF (approx. 2.5V) in
adjustable mode. FB3 is a dual-mode input that also selects the 3.3V fixed output
voltage setting when connected to GND. Connect FB3 to a resistor-divider for
adjustable-output mode.
12OUT
(MAX1902)
12V/120mA Linear-Regulator Output. Input supply comes from V
DD
. Bypass 12OUT to
GND with 1μF (min).
4
1
STEER
(MAX1901/
MAX1904)
Logic-Control Input for Secondary Feedback. Selects the PWM that uses a transformer
and secondary feedback signal (SECFB):
STEER = GND: 3.3V SMPS uses transformer
STEER = V
L
: 5V SMPS uses transformer
V
DD
(MAX1902)
Supply Voltage Input for the 12OUT Linear Regulator. Also connects to an internal
resistor-divider for secondary winding feedback and to an 18V overvoltage shunt
regulator clamp.
5
2
SECFB
(MAX1901/
MAX1904)
Secondary Winding Feedback Input. Normally connected to a resistor-divider from an
auxiliary output. SECFB regulates at V
SECFB
= 2.5V (see the
Secondary Feedback
Regulation Loop
section). Connect to V
L
if not used.
6
3
SYNC
Oscillator Synchronization and Frequency Select. Connect to V
L
for 500kHz operation;
connect to GND for 333kHz operation. Can be driven at 400kHz to 583kHz for external
synchronization.
7
4
TIME/ON5
Dual-Purpose Timing Capacitor Pin and ON/
OFF
Control Input. See the
Power-Up
Sequencing and ON/
OFF
Controls
section.
8
9
10
5
7
8
GND
REF
SKIP
Low-Noise Analog Ground and Feedback Reference Point
2.5V Reference Voltage Output. Bypass to GND with 1μF (min).
Log c- contr ol i np ut that d sab es i d e m od e w hen hi g h. C onnect to GN D for nor m al use.
11
9
RESET
Active-Low Timed Reset Output.
RESET
swings GND to V
L
. Goes high after a fixed
32,000 clock-cycle delay following power-up.
12
10
FB5
Feedback Input for the 5V SMPS. Regulates at FB5 = REF (approx. 2.5V) in adjustable
mode. FB5 is a dual-mode input that also selects the 5V fixed output voltage setting
when connected to GND. Connect FB5 to a resistor-divider for adjustable-output
mode.
13
11
CSL5
C ur ent- S ense Inp ut for the 5V S M P S Al so ser ves as the feed b ack i np ut i n fi xed outp ut
m od e, and as the b ootstr ap sup p y i np ut w hen the vol ag e on C S L5/V
L
i s > 4.5V
Current-Sense Input for the 5V SMPS. Current-limit level is 100mV referred to CSL5.
14
12
CSH5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1901ETJ+ | 功能描述:DC/DC 开关控制器 500kHz Multi-Output Power-Supply Ctlr 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 |
| MAX1901ETJ+T | 功能描述:DC/DC 开关控制器 500kHz Multi-Output Power-Supply Ctlr 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 |
| MAX1901ETJ-T | 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 |
| MAX1902EAI | 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 |
| MAX1902EAI+ | 功能描述:DC/DC 开关控制器 500kHz Multi-Output Power-Supply Ctlr 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 |
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