Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

Advanced

AMS2026

Monolithic

DUAL POWER DISTRIBUTION SWITCH

Systems

FEATURES

•• 110mΩ

Ω Typ. (5V Input) High Side MOSFET Switch

•• 100µµA Maximum On-State Supply Current

•• Short Circuit Protection

•• Available Active-High or Active-Low Enable

•• Overcurrent Protection

•• Available in Space Saving 8 lead SOIC and 8 lead PDIP

•• Thermal Protection

•• Enable Input Compatible With 3V and 5V Logic

APPLICATIONS

•• Controlled Rise and Fall Times Limit Current

•• USB Power Management

Surges and Minimize EMI

•• Hot Plug-In Power Supplies

•• Undervoltage Lock-Out Guarantees the Switch is

•• Battery-Charger Circuits

Off At Start-up

PRODUCT DESCRIPTION

The AMS2026 is a dual power distribution switch intended for applications where heavy capacitive loads and short-circuits

are likely to be encountered. The high-side switch is a 110m

Ω N-channel MOSFET. The switch is controlled by a logic

enable input compatible with 3V and 5V logic and is available in active-high or active-low enable. The internal charge pump,

designed to control the power switch rise and fall time to minimize current surges during switching, also provides the gate

drive. Requiring no external components the charge pump allows operation from supplies as low as 3.3V. When an overload

or a short circuit is encountered the AMS2026 limits the output current to a safe level by switching into a constant-current

mode and the overcurrent logic output error flag is set to a low. Continuous heavy overloads and short circuits will increase

the power dissipation in the switch; this will cause the junction temperature to rise. The thermal protection circuit shuts the

power switch off to prevent damage. Once the device has cooled sufficiently, it will turn on automatic. An under voltage

lock-out is provided to insure that the power switch is in the Off state at start-up.

The AMS2026 is offered in the 8 lead SOIC package and the 8 lead PDIP package.

ORDERING INFORMATION

PIN CONNECTIONS

PACKAGE TYPE

OPER. TEMP

8 LEAD SOIC

8 LEAD PDIP

RANGE

AMS2026S

AMS2026P

-40

°C to 85°C

8 LEAD SOIC/ 8 LEAD PDIP

1

2

8

4

3

7

5

6

GROUND

OUTPUT

INPUT

ENABLE

ERROR

OUTPUT

ENABLE

ERROR

Top View