ADM8832 is a charge pump regulator for color TFT panels. It features 3 output voltages (+5.1V, +15.3V, -10.2V) and low quiescent current. The product is optimized for use with TFT displays in mobile phones and offers fast transient response and power saving during blanking period.
The ADM8832 charge‑pump regulator is designed for color TFT LCD panels in handheld devices. It creates three regulated outputs (+5.1 V, +15.3 V, –10.2 V) from a 3 V supply, using an internal 100 kHz oscillator for scanning mode and an external clock for low‑power blanking mode.
The device is offered in a 20‑lead LFCSP package, features low quiescent current (<1 pA), shutdown capability, and high power efficiency (up to 80 % in scanning mode). Pin functions include separate control for shutdown, scan/blank mode, and LDO selection, allowing external LDOs to be used if desired.
| Input Voltage | 2.6 V to 3.6 V |
|---|---|
| +5.1 V Output Voltage | 5.0 V – 5.2 V |
| +5.1 V Output Current (Scanning) | 4 mA – 5 mA |
| +5.1 V Output Current (Blanking) | 50 µA – 200 µA |
| Power Efficiency (Scanning) | 80 % |
| Power Efficiency (Blanking) | 70 % |
| Output Ripple (+5.1 V) | 10 mV p‑p |
| +15.3 V Output Voltage | 14.4 V – 15.6 V |
| +15.3 V Output Current (Scanning) | 50 pA – 100 pA |
| -10.2 V Output Voltage | -10.4 V – -9.6 V |
| Charge Pump Frequency (Scanning) | 60 kHz – 140 kHz |
| SHDN Input Low Voltage | 0.3 V |
| SCAN/BLANK Input Low Voltage | 0.3 V |
The device operates from 2.6 V to 3.6 V input voltage.
It provides three regulated outputs: +5.1 V, +15.3 V and –10.2 V.
In scanning mode the regulator reaches about 80 % efficiency.
During blanking it switches to an external, lower‑frequency clock and disables the internal oscillator, lowering quiescent current.