参数资料
型号: MAX767EAP+T
厂商: Maxim Integrated Products
文件页数: 5/19页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 20-SSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
PWM 型: 电流模式
输出数: 1
频率 - 最大: 340kHz
占空比: 95%
电源电压: 4.5 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
5V-to-3.3V, Synchronous, Step-Down
Power-Supply Controller
______________________________________________________________Pin Description
PIN
1
2
3
4–7, 11
8
9
10, 14, 15
12
13
16
17
18
19
20
NAME
CS
SS
ON
GND
REF
SYNC
V CC
N.C.
PGND
DL
BST
LX
DH
FB
FUNCTION
Current-sense input: +100mV = nominal current-limit level referred to FB.
Soft-start input. Ramp time to full current limit is 1ms/nF of capacitance to GND.
— — –
ON/O F F control input to disable the PWM. Tie directly to V CC for automatic start-up.
Low-current analog ground. Feedback reference point for the output.
3.3V internal reference output. Bypass to GND with 0.22μF minimum capacitor.
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.
Supply voltage input: 4.5V to 5.5V
No internal connection
Power ground
Gate-drive output for the low-side synchronous rectifier MOSFET
Boost capacitor connection (0.1μF)
Inductor connection. Can swing 2V below GND without latchup.
Gate-drive output for the high-side MOSFET
Feedback and current-sense input for the PWM
INPUT
R2
4.5V TO 5.5V
C4
4.7 μ F
10 ?
D1
C1
SMALL-
SIGNAL
SHUTDOWN
ON/OFF
ON
VCC
BST
SCHOTTKY
DH
N1
C3
0.1 μ F
L1
R1
OUTPUT
3.3V
C5
0.01 μ F
SS
MAX767
LX
DL
N2
D2
C2
(OPTIONAL)
PGND
SYNC
CS
C6
0.22 μ F
Figure 1. Standard Application Circuit
REF
GND
FB
_______________________________________________________________________________________
5
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MAX767RCAP-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
MAX767REAP 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
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