参数资料
型号: MAX1791EUB+T
厂商: Maxim Integrated Products
文件页数: 11/20页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 10-UMAX
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 300kHz
电源电压: 5 V ~ 20 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
High-Efficiency, 10-Pin μMAX, Step-Down
Controllers for Notebooks
Table 2. Component Manufacturers
MANUFACTURER
Coiltronics
Fairchild Semiconductor
Sanyo
561-241-7876
408-822-2181
619-661-6835
USA PHONE
WEBSITE INFO
www.coiltronics.com
www.fairchildsemi.com
www.secc.co.jp
Sumida
USA
Japan
847-956-0666
81-3-3607-5111
www.sumida.com
Taiyo Yuden
408-573-4150
www.t-yuden.com
10 ?
VP
DH
VP
ON-TIME
COMPUTE
OUT
T OFF
Q T ON
TRIG
Q 1-SHOT
DH
DRIVER
1 μ F
Q1
C IN
V IN
TON
TRIG
1-SHOT
Q
S
R
Q
S
R
Q
VP
CS
VL
LINEAR
REG
ILIM
C VL
REF
REF
-30%
VOS
-100mV
SHDN
ON/OFF
CONTROL
VP
TIMER
UVP
LATCH
FEEDBACK
MUX
(FIGURE 9)
OUT
FB
VL
DL
DRIVER
DL
Q2
C OUT
OUT
GND
REF
C REF
2V
V REF
MAX1762
MAX1791
OUT
FB
Figure 5. Functional Diagram
VP Input and VL Logic Supply
An internal linear regulator supplied by VP produces
the +4.65V supply (VL) that powers the PWM controller,
logic, reference, and other blocks within the
MAX1762/MAX1791. This +4.65V low-dropout linear
regulator can supply up to 25mA for external loads.
Bypass VL to GND with at least a 1μF ceramic capaci-
tor. V VP can range between 5V and 20V. VL is turned
off when the device is in shutdown and drops by
approximately 500mV during a fault condition, such as
when the output is short circuited to ground, and recov-
ers when SHDN is cycled or power is reset. If VL is not
driven externally, then V VP should be at least 5V to
ensure operation. If V VP is running from a 5V (±10%)
supply, V VP should be externally connected to VL.
______________________________________________________________________________________
11
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