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參數資料
| 型號： | MAX767 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual J-K Negative-Edge-Triggered Flip-Flops With Preset And Clear 16-CDIP -55 to 125 |
| 中文描述： | 5V至3.3V輸出、同步整流、降壓型電源控制器 |
| 文件頁數： | 5/20頁 |
| 文件大小： | 192K |
| 代理商： | MAX767 |
M
5V-to-3.3V, S ync hronous, S tep-Down
Power-S upply Controller
_______________________________________________________________________________________
5
______________________________________________________________Pin Desc ription
16
NAME
FUNCTION
1
CS
Current-sense input: +100mV = nominal current-limit level referred to FB.
2
SS
Soft-start input. Ramp time to full current limit is 1ms/nF of capacitance to GND.
ON/O——control input to disable the PWM. Tie directly to V
CC
for automatic start-up.
3
ON
PIN
DL
Gate-drive output for the low-side synchronous rectifier MOSFET
4–7, 11
GND
Low-current analog ground. Feedback reference point for the output.
8
REF
3.3V internal reference output. Bypass to GND with 0.22μF minimum capacitor.
9
SYNC
Oscillator control/synchronization input. Connect to V
CC
or GND for 200kHz; connect to REF for
300kHz. For external clock synchronization in the 240kHz to 350kHz range, a high-to-low transition
causes a new cycle to start.
10, 14, 15
V
CC
Supply voltage input: 4.5V to 5.5V
17
BST
Boost capacitor connection (0.1μF)
12
N.C.
No internal connection
13
PGND
Power ground
18
LX
Inductor connection. Can swing 2V below GND without latchup.
19
DH
Gate-drive output for the high-side MOSFET
20
FB
Feedback and current-sense input for the PWM
OUTPUT
3.3V
LX
DL
GND
SS
MAX767
ON
VCC
REF
L1
BST
DH
D2
PGND
CS
FB
SHUTDOWN
ON/OFF
N1
N2
D1
SMALL-
SIGNAL
SCHOTTKY
C1
R1
C3
0.1
μ
F
C2
C6
0.22
μ
F
C5
(OPTIONAL)
SYNC
R2
10
INPUT
4.5V TO 5.5V
0.01
μ
F
C4
4.7
μ
F
Figure 1. Standard Application Circuit
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| MAX767CAP | 5V-to-3.3V, Synchronous, Step-Down Power-Supply Controller |
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| MAX767REAP | 5V-to-3.3V, Synchronous, Step-Down Power-Supply Controller |
| MAX767TEAP | 5V-to-3.3V, Synchronous, Step-Down Power-Supply Controller |
| MAX768 | Dual J-K Negative-Edge-Triggered Flip-Flops With Preset And Clear 16-CFP -55 to 125 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX767CAP | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX767CAP+ | 功能描述:DC/DC 開關控制器 5-3.3V Out Synchrons Power Supply Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX767CAP+T | 功能描述:DC/DC 開關控制器 5-3.3V Out Synchrons Power Supply Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX767CAP-T | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX767EAP | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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