Document
ecoSWITCHt Advanced Load Management
Controlled Load Switch with Low RON
NCP45520, NCP45521
The NCP4552x series of load switches provide a component and area-reducing solution for efficient power domain switching with inrush current limit via soft start. In addition to integrated control functionality with ultra low on−resistance, these devices offer system safeguards and monitoring via fault protection and power good signaling. This cost effective solution is ideal for power management and hot-swap applications requiring low power consumption in a small footprint.
Features
• Advanced Controller with Charge Pump
• Integrated N-Channel MOSFET with Low RON • Input Voltage Range 0.5 V to 13.5 V
• Soft-Start via Controlled Slew Rate
• Adjustable Slew Rate Control (NCP45521)
• Power Good Signal (NCP45520)
• Thermal Shutdown
• Undervoltage Lockout
• Short-Circuit Protection
• Extremely Low Standby Current
• Load Bleed (Quick Discharge)
• This is a Pb−Free Device
Typical Applications
• Portable Electronics and Systems
• Notebook and Tablet Computers
• Telecom, Networking, Medical, and Industrial Equipment
• Set−Top Boxes, Servers, and Gateways
• Hot Swap Devices and Peripheral Ports
VCC
EN PG*
VIN
Bandgap &
Biases
Control Logic
Thermal, Undervoltage
& Short−Circuit
Protection
Charge Pump
Delay and Slew Rate
Control
SR*
GND
BLEED
VOUT
Figure 1. Block Diagram
(*Note: either PG or SR available for each part)
www.onsemi.com
RON TYP 9.5 mW
10.1 mW 12.8 mW
VCC 3.3 V
3.3 V 3.3 V
VIN 1.8 V
5.0 V 12 V
IMAX 10.5 A
1
DFN8, 2x2 CASE 506CC
MARKING DIAGRAM
1 XX MG G
XX = PH for NCP45520−H = PL for NCP45520−L = SH for NCP45521−H = SL for NCP45521−L
M = Date Code G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONFIGURATION
VIN 1
8 VOUT
EN 2 VCC 3
9: VIN
7 VOUT 6 PG or SR
GND 4
(Top View)
5 BLEED
ORDERING INFORMATION
See detailed ordering and shipping information on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
February, 2020 − Rev. 4
1
Publication Order Number: NCP45520/D
NCP45520, NCP45521
Table 1. PIN DESCRIPTION Pin Name 1, 9 VIN 2 EN
3 VCC 4 GND 5 BLEED 6 PG
SR 7, 8 VOUT
Function Drain of MOSFET (0.5 V – 13.5 V), Pin 1 must be connected to Pin 9 NCP45520−H & NCP45521−H − Active−high digital input used to turn on the MOSFET, pin has an internal pull down resistor to GND NCP45520−L & NCP45521−L − Active−low digital input used to turn on the MOSFET, pin has an internal pull up resistor to VCC Supply voltage to controller (3.0 V − 5.5 V) Controller ground Load bleed connection, must be tied to VOUT either directly or through a resistor ≤ 1 kW NCP45520 − Active−high, open−drain output that indicates when the gate of the MOSFET is fully charged, external pull up resistor ≥ 1 kW to an external voltage source required; tie to GND if not used NCP45521 − Slew rate adjustment; float if not used Source of MOSFET connected to load
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
S.