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参数资料
| 型号： | MAX8621YETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/18页 |
| 文件大小： | 0K |
| 描述： | IC PMIC W/DC-DC SUP 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 手持/移动设备 |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
Dual Step-Down DC-DC Power-Management ICs
for Portable Devices
Table 1. SEL1 and SEL2, MAX8621Y/MAX8621Z Output Voltage Selection
SEL1
SEL2
OUT1 (V)
MAX8621Y
OUT2 (V) OUT3 (V)
OUT4 (V)
OUT1 (V)
MAX8621Z
OUT2 (V) OUT3 (V)
OUT4 (V)
IN
IN
IN
OPEN
OPEN
OPEN
GND
GND
GND
IN
OPEN
GND
IN
OPEN
GND
IN
OPEN
GND
3.3
3.0
2.5
2.85
3.3
3.3
3.3
2.85
3.3
3.3
3.3
3.3
3.3
3.3
3.3
2.85
2.85
2.85
2.85
3.3
2.85
3.0
2.8
3.0
3.3
3.3
3.0
2.85
2.85
3.0
2.5
3.0
3.0
2.85
3.3
3.0
2.8
2.6
2.6
2.6
2.6
2.6
2.9
3.0
3.0
2.6
2.6
2.6
2.6
2.6
2.6
3.1
2.9
2.5
3.0
3.0
2.9
3.0
1.8
2.8
1.8
2.9
2.9
3.0
3.0
2.9
3.3
3.0
3.0
1.5
2.9
2.9
Power-Supply Sequence
BUCK1 is always first on and last off in the MAX8621Y/
MAX8621Zs’ power sequence. BUCK1 turns on approxi-
mately 40μs after PWRON is enabled. BUCK2 turns on
approximately 40μs after BUCK1, and OUT1 turns on
65μs after BUCK2. These delays have been added to
sequence the turn-on of the step-down converters and
LDOs so that the initial current surges are distributed
PWRON
REF
over time. For the same reason, OUT2, OUT3, and OUT4
can be turned on by EN2 , EN3, and EN4 signals, but
only after OUT1 has reached 87% of its final value. Note
that OUT2 typically requires a longer time to enable than
OUT3 and OUT4 (45μs versus 15μs). All regulators can
be turned off at the same time when PWRON is low, but
BUCK1 remains on for approximately another 120μs
after PWRON goes low.
BUCK1
40 μ s
40 μ s
120 μ s
BUCK2
65 μ s
87% REGULATION
OUT1
RESET
OUT2
EN3
(EN4)
OUT3
15 μ s
87% REGULATION
60ms
45 μ s
(OUT4)
EN2
Figure 2. Power-On/Off Sequence Diagram
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8621ZETG | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG+ | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG+T | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZETG-T | 功能描述:PMIC 解决方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX8621ZEVKIT | 制造商:Maxim Integrated Products 功能描述:DUAL STEP-DOWN POWER MANAGEMENT IC - Rail/Tube |
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