- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385553 > MAX8621YETG (MAXIM INTEGRATED PRODUCTS INC) Dual Step-Down DC-DC Power-Management ICs for Portable Devices PDF資料下載
參數(shù)資料
| 型號： | MAX8621YETG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Dual Step-Down DC-DC Power-Management ICs for Portable Devices |
| 中文描述： | 6-CHANNEL POWER SUPPLY SUPPORT CKT, QCC24 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, THIN QFN-24 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大小： | 360K |
| 代理商： | MAX8621YETG |
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
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.
M
Dual Step-Down DC-DC Power-Management ICs
for Portable Devices
______________________________________________________________________________________
11
MAX8621Y
MAX8621Z
SEL1
SEL2
OUT1 (V)
3.3
3.0
2.5
2.85
3.3
3.3
3.3
2.85
3.3
OUT2 (V)
3.3
3.3
3.3
3.3
3.3
3.3
2.85
2.85
2.85
OUT3 (V)
2.85
3.3
2.85
3.0
2.8
3.0
3.3
3.3
3.0
OUT4 (V)
2.85
2.85
3.0
2.5
3.0
3.0
2.85
3.3
3.0
OUT1 (V)
2.8
2.6
2.6
2.6
2.6
2.6
2.9
3.0
3.0
OUT2 (V)
2.6
2.6
2.6
2.6
2.6
2.6
3.1
2.9
2.5
OUT3 (V)
3.0
3.0
2.9
3.0
1.8
2.8
1.8
2.9
2.9
OUT4 (V)
3.0
3.0
2.9
3.3
3.0
3.0
1.5
2.9
2.9
IN
IN
IN
IN
OPEN
GND
IN
OPEN
GND
IN
OPEN
GND
OPEN
OPEN
OPEN
GND
GND
GND
Table 1. SEL1 and SEL2, MAX8621Y/MAX8621Z Output Voltage Selection
PWRON
BUCK2
OUT1
BUCK1
REF
EN2
OUT3
(OUT4)
EN3
(EN4)
OUT2
RESET
15
μ
s
65
μ
s
40
μ
s
87% REGULATION
87% REGULATION
60ms
45
μ
s
120
μ
s
40
μ
s
Figure 2. Power-On/Off Sequence Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX8621Y | Dual Step-Down DC-DC Power-Management ICs for Portable Devices |
| MAX8621ZETG | Dual Step-Down DC-DC Power-Management ICs for Portable Devices |
| MAX863 | Dual, High-Efficiency, PFM, Step-Up DC-DC Controller(雙輸出,高效,PFM,步升DC-DC變換器) |
| MAX870C | TV 55C 55#20 PIN WALL RECP |
| MAX870D | Switched-Capacitor Voltage Inverters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8621YETG+ | 功能描述:PMIC 解決方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8621YETG+T | 功能描述:PMIC 解決方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8621YETG-T | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8621ZETG | 功能描述:PMIC 解決方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX8621ZETG+ | 功能描述:PMIC 解決方案 Dual Step-Down PMIC for Portable Devices RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。