Analog Devices Inc. ADM8830ACPZ

Overview

ADM8830ACPZ from Analog Devices is a CMOS charge pump regulator IC designed specifically to power color TFT LCD panels in mobile phones and handheld instruments. It generates three regulated outputs (+5.1 V ±2%, +15.3 V, –10.2 V) from a single 2.6–3.6 V input, supports dual-mode operation (scanning/blanking), and features Green Idle™ oscillator control for 5.1 V output efficiency optimization.

For engineers reviewing the ADM8830ACPZ datasheet, ADM8830ACPZ pinout, ADM8830ACPZ application, or ADM8830ACPZ equivalent, key selection criteria include its triple-output voltage generation architecture, 5 µs transient response on the +5.1 V rail, shutdown current <1 µA, scanning-mode supply current of 150–400 µA, and LFCSP-20 package compatibility with space-constrained portable displays.

Technical Context

The ADM8830ACPZ integrates a voltage doubler, tripler, and inverter topology driven by either an internal 100 kHz oscillator (scanning mode) or external 1 kHz clock (blanking mode). Its control logic sequences power-up so –10.2 V ramps before +15.3 V to prevent TFT panel damage.

It uses a dedicated LDO regulator for the +5.1 V output with selectable internal/external regulation via LDO_ON/OFF, while the +15.3 V and –10.2 V outputs derive from charge-pumped stages fed by the regulated +5.1 V rail. Output ripple is specified at 10 mV_p-p (8 mA load) and 50 mV_p-p (±100 µA loads).

Key Specifications

Pinout & Package

The ADM8830ACPZ is packaged in a 20-lead Lead Frame Chip Scale Package (LFCSP), 4 mm × 4 mm body, with exposed thermal pad (CP-20-1). Pin 1 is marked by a dot; top-side pin numbering follows standard LFCSP layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar charge pump regulator applications.

Compared with MAX1605EUP+ and TPS65105RGER, the ADM8830ACPZ uniquely balances triple-output capability, ultra-low blanking-mode current, and hardware-enforced power sequencing-making it optimal for compact, battery-sensitive color TFT implementations where display update dynamics vary widely.

Availability

ADM8830ACPZ is available at Aetrix Electronics and suitable for mobile phone display power, handheld instrument LCD bias, and portable medical device TFT panel applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for ADM8830ACPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.

The ADM8830ACPZ belongs to Analog Devices' display power management product line, engineered specifically for low-power, multi-rail TFT LCD bias in space-constrained portable electronics with stringent battery-life requirements.

FAQ

What is the function of the SCAN/BLANK pin on the ADM8830ACPZ?

The SCAN/BLANK pin on the ADM8830ACPZ selects between two operating modes: a logic high enables scanning mode, activating the internal 100 kHz oscillator for high-current operation during active display updates; a logic low enables blanking mode, switching to an external 1 kHz clock to reduce quiescent current to 70–140 µA. This dual-mode control directly optimizes power efficiency based on display refresh demand, and the ADM8830ACPZ's timing generator enforces correct sequencing regardless of mode.

Can the ADM8830ACPZ operate without an external clock source?

Yes-the ADM8830ACPZ operates autonomously in scanning mode using its internal 100 kHz oscillator, requiring no external clock. However, in blanking mode, the ADM8830ACPZ mandates an external clock applied to CLKIN (1 kHz typical) to drive the charge pumps at reduced frequency. Omitting the external clock while SCAN/BLANK is low will halt output regulation, making external clock provision essential for blanking-mode operation.

How does the ADM8830ACPZ ensure safe power-up sequencing for TFT panels?

The ADM8830ACPZ guarantees safe TFT panel power-up by hardware-enforcing output sequencing: the –10.2 V output begins ramping immediately at startup, and the +15.3 V output remains disabled until –10.2 V reaches –3 V. Only then does +15.3 V begin rising. This sequence prevents gate-to-source overvoltage stress on TFT transistors. The ADM8830ACPZ implements this entirely internally-no external timing components or controllers are needed to achieve compliant sequencing.

What is the purpose of the LDO_ON/OFF pin on the ADM8830ACPZ?

The LDO_ON/OFF pin on the ADM8830ACPZ controls whether the internal LDO regulates the +5.1 V output: a logic high enables the internal LDO, while a logic low disconnects it, allowing an external LDO to regulate the +5.1 V rail instead. This flexibility lets designers substitute higher-efficiency, lower-noise, or thermally optimized external regulators. When using an external LDO, its output connects to +5VIN (Pin 5) to feed the +15.3 V and –10.2 V charge pump stages-ensuring the ADM8830ACPZ retains full functionality.

Is the ADM8830ACPZ pin-compatible with other packages in the ADM8830 family?

No-the ADM8830ACPZ (LFCSP-20, CP-20-1) has a different pinout and land pattern than the ADM8830ARU (TSSOP-20, RU-20). While both share identical electrical functionality and parameter specifications, their physical layouts differ: the LFCSP places GND at Pin 18 and –10VOUT at Pin 17, whereas the TSSOP places GND at Pin 18 and –10VOUT at Pin 17 but with reversed C-capacitor pin assignments. PCB designs must be re-routed when substituting between ADM8830ACPZ and ADM8830ARU variants.