The ADM8839 is a charge pump regulator used for color thin film transistor panels. It features low quiescent current, low shutdown current, and power efficiency optimization.
The ADM8839 is a charge‑pump regulator designed for color TFT LCD panels used in hand‑held instruments, cellular phones and other devices. It generates three supply voltages (+5 V, +15 V and –15 V) from a single 3 V input and includes an internal LDO with shutdown capability and an option for an external LDO.
The document provides full electrical specifications, pin descriptions, typical performance curves, power‑sequencing behavior, and transient response data. It also lists absolute maximum ratings, thermal characteristics, and package information for the 20‑lead LFCSP version.
| Input Voltage (VEE) | Min 2.7 V, Typ 4.2 V |
|---|---|
| Supply Current, Unloaded | Min 250 µA, Typ 500 µA |
| Shutdown Mode Current (Ta=25 °C) | 5 µA |
| +5 V Output Voltage | Min 4.9 V, Typ 5.0 V, Max 5.1 V |
| +5 V Output Current | 5 mA to 20 mA |
| +5 V Output Ripple (8 mA load) | 10 mV p‑p |
| +15 V Output Voltage | Min 14.0 V, Typ 15.0 V, Max 16.0 V |
| Charge Pump Frequency | 60 kHz to 140 kHz |
| Package Type | 20‑lead LFCSP |
The shutdown mode current is 5 µA at 25 °C.
It provides three output voltages: +5 V, +15 V, and –15 V from a single 3 V supply.
The ADM8839 is supplied in a 20‑lead LFCSP package.