ADM8832: Charge Pump Regulator for Color TFT Panel |
The ADM8832 is a charge pump regulator used for color thin film transistor (TFT) liquid crystal displays (LCD). Using charge pump technology, the device can be used to generate three output voltages (+5.1 V 2%, +15.3 V, –10.2 V) from a single 3 V input supply. These outputs are then used to provide supplies for the LCD controller (+5.1 V) and the gate drives for the transistors in the panel ...続きを見る
The ADM8832 is a charge pump regulator used for color thin film transistor (TFT) liquid crystal displays (LCD). Using charge pump technology, the device can be used to generate three output voltages (+5.1 V 2%, +15.3 V, –10.2 V) from a single 3 V input supply. These outputs are then used to provide supplies for the LCD controller (+5.1 V) and the gate drives for the transistors in the panel (+15.3 V and –10.2 V). Only a few external capacitors are needed for the charge pumps. An efficient low dropout voltage regulator also ensures that the power efficiency is high and provides a low ripple 5.1 V output. This LDO can be shut down and an external LDO used to regulate the 5 V doubler output and drive the input to the charge pump section, which generates the +15.3 V and –10.2 V outputs if so required by the user.
The ADM8832 has an internal 100 kHz oscillator for use in scanning mode, but the part must be clocked by an external clock source in blanking (low current) mode. The internal oscillator is used to clock the charge pumps during scanning mode where the current is highest. During blanking periods, the ADM8832 switches to use an external, lower frequency clock. This allows the user to vary the frequency and maximize power efficiency during blanking periods. The tolerances on the output voltages are seamlessly maintained when switching from scanning mode to blanking mode or vice versa.
The ADM8832 has a number of power saving features, including low power shutdown and reduced quiescent current consumption during the blanking periods mentioned above. The 5.1 V output consumes the most power, so power efficiency is also maximized on this output with an oscillator enabling scheme (Green Idle™). This effectively senses the load current that is flowing and turns on the charge pump only when charge needs to be delivered to the 5 V pump doubler output.
The ADM8832 is fabricated using CMOS technology for minimal power consumption. The part is packaged in a 20-lead LFCSP (lead frame chip scale package).
| Part# | Input Voltage (V) | Vout Preset (V) | Iout | Power Efficiency (%) | Supply Current | Shutdown Current, max | Boost | Inverter | Regulated Output | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ADM660 | 1.5 - 7 | -Vin or 2*Vin | 100mA | 80 | 4.5mA | 5µA | Y | Y | --- | DIP/SO/TSSOP | $1.82 |
| ADM8660 | 1.5 - 7 | -Vin | 100mA | 80 | 4.5mA | 5µA | --- | Y | --- | DIP/SO/TSSOP | $1.92 |
| ADM8828 | 1.5 - 5.5 | -Vin | 25mA | 99 | 1mA | 2µA | --- | Y | --- | 6-Lead SOT 23 | $0.76 |
| ADM8829 | 1.5 - 5.5 | -Vin | 25mA | 99 | 1mA | n/a | --- | Y | --- | 6-Lead SOT 23 | $0.76 |
| ADM8832 | 2.6 - 3.6 | +5.1/+15.3/-10.3 | 5mA | 90 | 400µA | 1µA | Y | Y | Y | LFCSP-20 | $2.02 |
| ADM8839 | 2.6 - 3.6 | +5/+15/-15 | 8mA | 82 | 500µA | 5µA | Y | Y | Y | LFCSP-20 | $1.92 |
| ADP3605 | 3-6v | -3v/adj | 120mA | n/a | 6mA | 15µA | --- | Y | Y | SOIC-8, TSSOP-14 | $1.50 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.
| モデル | 製品状況 | パッケージ | ピン数 | 動作 温度範囲 |
価格* (1000 pcs.) |
Production** Availability |
RoHS互換 | PCN | サンプル・カート | 購入カート |
|---|---|---|---|---|---|---|---|---|---|---|
| ADM8832-EVALZ | 製造中 | 20 | 工業用 | - | - | Y | - | カートに入れる | カートに入れる | |
| ADM8832ACP | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.23 | - | N 成分表 | PCN | カートに入れる | カートに入れる |
| ADM8832ACP-REEL | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.23 | - | N 成分表 | PCN | お問い合わせ | お問い合わせ |
| ADM8832ACP-REEL7 | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.23 | - | N 成分表 | PCN | お問い合わせ | カートに入れる |
| ADM8832ACPZ | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.02 | 11/27/2009 | Y 成分表 | PCN | カートに入れる | カートに入れる |
| ADM8832ACPZ-REEL | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.02 | - | Y 成分表 | PCN | お問い合わせ | お問い合わせ |
| ADM8832ACPZ-REEL7 | 製造中 | 20 ld LFCSP (4x4mm) | 20 | 工業用 | $2.02 | 11/27/2009 | Y 成分表 | PCN | お問い合わせ | カートに入れる |
| ADM8832EB-EVALZ | お問い合わせ | 20 | 工業用 | $151.80 | - | Y | - | お問い合わせ | お問い合わせ |
*価格は1個当たりの米ドルで、米国内における販売価格（FOB）で表示されておりますので、予算のためにのみご使用いただけます。 また、その価格は変更されることがあります。米国以外のお客様への価格は、輸送費、各国の税金、手数料、為替レートにより決定されます。価格・納期等の詳細情報については、弊社正規販売代理店または担当営業にお問い合わせください。なお、 評価用ボードおよび評価用キットの表示価格は1個構成としての価格です。
**製品購入よりもサンプル注文の方が早く届く場合があります。入手性については、カートの中の「Availability」の欄をご覧ください。
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