lm2940t-9.0 - 1a low dropout regulator - national semiconductor
- 型 号:
- lm2940t-9.0 - 1a low dropout regulator - national semiconductor
- 订货量:
- (pcs):>=1
- 发货地点:
- 广东省/深圳
- 产品类别:
- 稳压ic
- 更新时间:
- 2013/7/30 9:23:52
商品详情
批号:其他
封装:cdip
型号:lm2940t-9.0
lm2940t-9.0 - 1a low dropout regulator - national semiconductor
lm2940/lm2940c
1a low dropout regulator
general description
the lm2940/lm2940c positive voltage regulator features
the ability to source 1a of output current with a dropout
voltage of typically 0.5v and a maximum of 1v over the
entire temperature range. furthermore, a quiescent current
reduction circuit has been included which reduces the
ground current when the differential between the input voltage
and the output voltage exceeds approximately 3v. the
quiescent current with 1a of output current and an inputoutput
differential of 5v is therefore only 30 ma. higher
quiescent currents only exist when the regulator is in the
dropout mode (vin ? vout ≤ 3v).
designed also for vehicular applications, the lm2940/
lm2940c and all regulated circuitry are protected from reverse
battery installations or 2-battery jumps. during line
transients, such as load dump when the input voltage can
momentarily exceed the specified maximum operating voltage,
the regulator will automatically shut down to protect
both the internal circuits and the load. the lm2940/
lm2940c cannot be harmed by temporary mirror-image insertion.
familiar regulator features such as short circuit and
thermal overload protection are also provided.
features
n dropout voltage typically 0.5v @io = 1a
n output current in excess of 1a
n output voltage trimmed before assembly
n reverse battery protection
n internal short circuit current limit
n mirror image insertion protection
n p product enhancement tested