ADP3310

Features:

61.5% Accuracy Over Line, Load and Temperature
Low 800 mA (Typical) Quiescent Current
Shutdown Current: 1 mA (Typical)
Stable with 10 mF Load Capacitor
+2.5 V to +15 V Operating Range
Fixed Output Voltage Options: 2.8 V, 3 V, 3.3 V, 5 V
Up to 10 A Output Current
SO-8 Package
408C to +858C Ambient Temperature Range
Internal Gate to Source Protective Clamp
Current and Thermal Limiting
Programmable Current Limit
Foldback Current Limit


Application

Desktop Computers
Handheld Instruments
Cellular Telephones
Battery Operated Devices
Solar Powered Instruments
High Efficiency Linear Power Supplies
Battery Chargers



Pinout

PIN FUNCTION DESCRIPTIONS
Pin SO-8	Name	Function
1	IS	Current Sense. Connected to the more negative terminal of the sense resistor as well as the Power MOSFET's source pin. IS must be tied to VIN pin if the current limit feature is not used.
2, 6	NC	No Connect.
3	GATE	Gate Drive for the external MOSFET.
4	VIN	Input Voltage. This is also the positive terminal connection of the current sense resistor.
5	VOUT	Output Voltage Sense. This pin is connected to the MOSFET's drain and directly to the load for optimal load regulation. Bypass to ground with a 10 mF or larger capacitor.
7	GND	Device Ground. This pin should be tied to system ground closest to the load.
8	EN	Enable. Pulling this pin to a logic High or tying the pin to the input voltage will enable the output. Pulling this pin low will disable the regulator output.

Specifications

Input Voltage, V_IN   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20 V
Enable Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to V_IN + 0.3 V
Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to +125°C
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  +220°C
q_JA (4-Layer Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  +121°C/W
q_JA (2-Layer Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C/W
*This is a stress rating only; operation beyond these limits can cause the device to be permanently damaged.


Description

The ADP3310 is a precision voltage regulator controller that can be used with an external Power PMOS device such as the NDP6020P to form a two chip low dropout linear regulator. The low quiescent current (800 mA) and the Enable feature make this device especially suitable for battery powered systems. The dropout voltage at 1 A is only 70 mV when used with the NDP6020P, allowing operation with minimal headroom and prolonging battery useful life. The ADP3310 can drive a wide range of currents, depending on the external PMOS device used.

Additional features of ADP3310 include: high accuracy (±1.5%) over line, load and temperature, gate-to-source voltage clamp to protect the external MOSFET and foldback current limit. A current limit threshold voltage of 50 mV (typ) allows 50 mW of board metal trace resistance to provide a 1 A current limit.

The ADP3310 operates from a wide input voltage range from 2.5 V to 15 V and is available in a small SO-8 package.