Overview
The ADP1850ACPZ-R7, produced by Analog Devices Inc., is a highly configurable dual output or two-phase, single output DC-DC synchronous buck controller. This device is designed to operate from a wide input voltage range of 2.75 V to 20 V, making it versatile for various applications. It features high speed, high peak current drive capability, and dead-time optimization to enable energy-efficient power conversion. The ADP1850 is particularly useful in systems requiring multiple output voltages and includes features such as synchronization to eliminate beat frequencies, accurate tracking capability, and precision enable for robust sequencing.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Voltage | VIN | 2.75 | 20 | V | ||
| Undervoltage Lockout Threshold | INUVLO | VIN rising | 2.45 | 2.6 | 2.75 | V |
| Undervoltage Lockout Threshold | INUVLO | VIN falling | 2.4 | 2.5 | 2.6 | V |
| Undervoltage Lockout Hysteresis | 0.1 | V | ||||
| Quiescent Current | IIN | EN1 = EN2 = VIN = 12 V, VFB = VCCO in PWM mode (no switching) | 4.5 | 5.8 | mA | |
| VIN to VCCO Dropout Voltage | VDROPOUT | IVCCO = 100 mA, VIN ≤ 5 V | 0.33 | V | ||
| Gate Drivers Rise Time | CDH | CDH = 3 nF, VBST − VSW = 5 V | 16 | ns | ||
| Gate Drivers Fall Time | CDH | CDH = 3 nF, VBST − VSW = 5 V | 14 | ns | ||
| Operating Temperature | -40 | 85 | °C | |||
| Package Type | 32-lead LFCSP (5x5) |
Key Features
- High speed, high peak current drive capability with dead-time optimization for energy-efficient power conversion.
- Configurable dual output or two-phase, single output operation.
- Wide input voltage range of 2.75 V to 20 V.
- Current mode operation with valley current sensing for enhanced noise immunity.
- Accurate current sharing between interleaved phases for high current outputs.
- Synchronization feature to eliminate beat frequencies between switching devices.
- Precision enable for simple, robust sequencing.
- Power saving mode (PSM) for improved energy efficiency at light load and standby conditions.
- External programmability of loop compensation, soft start, frequency setting, power saving mode, current limit, and current sense gain.
- Protection features include undervoltage lockout, overvoltage, overcurrent/short-circuit, and overtemperature protection.
- Compact 32-lead LFCSP 5 mm × 5 mm thermally enhanced package.
Applications
- Point-of-load power supplies.
- Telecom base station and networking equipment.
- Consumer electronics.
- Industrial and instrumentation applications.
- Healthcare and medical devices.
Q & A
- What is the input voltage range of the ADP1850ACPZ-R7? The input voltage range is from 2.75 V to 20 V.
- What is the operating temperature range of the ADP1850ACPZ-R7? The operating temperature range is from -40°C to 85°C.
- What type of package does the ADP1850ACPZ-R7 come in? It comes in a 32-lead LFCSP (5x5) thermally enhanced package.
- Does the ADP1850ACPZ-R7 support power saving mode? Yes, it supports power saving mode (PSM) for improved energy efficiency at light load and standby conditions.
- What protection features does the ADP1850ACPZ-R7 include? It includes undervoltage lockout, overvoltage, overcurrent/short-circuit, and overtemperature protection.
- Can the ADP1850ACPZ-R7 be configured for multiple output voltages? Yes, it is designed to support multiple output voltages and includes features like synchronization and accurate tracking capability.
- How does the ADP1850ACPZ-R7 enhance noise immunity? It uses valley current sensing to enhance noise immunity.
- What is the quiescent current of the ADP1850ACPZ-R7 in PWM mode? The quiescent current is 4.5 mA to 5.8 mA when EN1 = EN2 = VIN = 12 V, VFB = VCCO in PWM mode (no switching).
- Can the loop compensation and other parameters be programmed externally? Yes, the loop compensation, soft start, frequency setting, power saving mode, current limit, and current sense gain can all be programmed using external components.
- What is the typical rise and fall time of the gate drivers? The typical rise time is 16 ns and the typical fall time is 14 ns.
