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Sender: "piclist-bounces@mit.edu" Date: Wed, 5 Feb 2020 09:35:42 -0800 Subject: [EE] 78L05 (SO8) overshoot on removal of over-current event? Thread-Topic: [EE] 78L05 (SO8) overshoot on removal of over-current event? Thread-Index: AdXcTIBLIHchqDq7SE2ADRAnes17GQ== Message-ID: List-Help: List-Subscribe: , List-Unsubscribe: , Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.167.182 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.167.182; helo=mail-oi1-f182.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=TxXvgabPtHOTiCnmZprKSd5swKfMoB+WP3izHaPh4u4=; b=Z3V7yk9kkmK7DolK38eKurZivIpJCHCpew4s5zrE4XlapL7n+8UD3Mv1Fv9L5sa+Mq XlGoFCMgGDYDxfZxoGPoVgHKZiYwg9Kbyvw6Lk9GpBvYn4lLSo3qKimWDY0k9eUZTwqS 2ml4umafwfXXsLORCvJ3dv9tapbZPUpvHtz8+EhJMaJaLBb+JpiD9okixUWX8CeaG4f+ 2D7b8MZb+ZKVrwVGEFtwnItkAhbhwU0D8DIwQCaA/IxXPdPuEzxIjEpkG4rR+Rixafd4 LlrDNNkZFw013Go9GehhoUK2gT4ftj6ST5Qu53Ee+poFrZbmSfblffUIl3/vXWKjLMds 1xpQ== authentication-results: spf=pass (sender IP is 209.85.167.182) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com;mit.edu; dmarc=pass action=none header.from=gmail.com;compauth=pass reason=100 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:aca:2813:: with SMTP id 19mr3860719oix.76.1580924176843; Wed, 05 Feb 2020 09:36:16 -0800 (PST) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Hello everyone, At a previous job I observed a failure mode where the 100mA current rating of a 78L05 type regulator (12->5V, SO8) was exceeded causing it to saturate and then briefly overshoot to >7V when the load was removed causing damage to 5V circuitry. (a micro-controller was driving a large number of opto-isolators, all toggled on and off at the same time) Do anyone have any links to literature that documents this behavior? --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .