Cyp9461 Mosfet 60V 1.2A 480kHz DC-DC Step-Down Switch-Mode Converter IC

• shape: Flat
• Conductive Type: Unipolar Integrated Circuit
• Integration: GSI
• Application: Specific Integrated Circuits
• Type: Digital IC
• Package: Esop-8
• Model NO.: CYP9461
• Manner of Packing: Reel
• Devices Per Bag/Reel: 4000PCS
• Ship by: DHL/FedEx/ UPS
• Lead Time: 7 Working Days After Receiving Payment
• Trademark: CY
• Origin: China
• HS Code: 8542399000
• Production Capacity: 200000PCS/Year

Product Description

General Description

The CYP9461 is a monolithic, step-down,   switch-mode   converter with a built-in power MOSFET. Current-mode operation provides a fast transient response and eases loop stabilization.

The wide input range (4.5V to 60V) provides high efficiency output of 1.2A current. Low shutdown mode quiescent current of 0.1μA is suitable for battery-powered applications.

Fault state protection includes Cycle by Cycle OCP and thermal shutdown protection.



Features

• Output 1.2A peak current
• Operation from 4.5V to 60V Input
• 1Ω internal power MOSFET
• 480KHz fixed switching frequency
• Stable with ceramic output capacitors
• Cycle by Cycle OCP
• Thermal shutdown protection
• >90% efficiency
• Output voltage: adjustable from +0.81V to 0.95VIN
• Low shutdown mode current: <1μA
• ESOP-8 package with good heat dissipation

Applications    

• High voltage power conversion
• Automotive systems
• Industrial power system
• Distributed power system
• Battery powered system

Pin Assignment

 

 

Pin No.	Pin Name	Description
1	VIN	Input Supply. All internal control circuits are powered. A decoupling capacitor to ground is required close to this pin to reduce switching spikes.

 

2	NC	No connected.
3	EN	Enable input. Pull this pin below the specified threshold to disable. Pull it above the specified threshold to enable. Connect 100K resistor to IN, it can be turned on automatically.
4	FB	Feedback. This is the input to the error amplifier. Set the output voltage. When the load is short-circuited and the FB voltage is lower than 250mV, the reentry circuit  will reduce the oscillation frequency to ensure reliable current limiting protection.
5	NC	No connected.
6	GND	Ground. It should be connected as close as possible to the output capacitor, avoid high current switching paths.
7	BST	Bootstrap. This is the positive power supply for the internal floating high side MOSFET driver. Connect a bypass capacitor between this pin and SW pin.
8	SW	Switch node. A low VF Schottky diode to ground is required close to this pin to reduce switching spikes.

Electrical Characteristics

 

Parameter	Symbol	Test Conditions	Min	Typ	Max	Unit
Feedback Voltage	Vfb	4.5<Vin<60V	0.792	0.812	0.832	V
Upper Switch ON Resistance	Rsw	Vbst-Vsw=5V		1		Ω
Upper Switch Leakage	Iswleak	Ven=0V, Vsw=0V			1	μA
Limiting Current	Ilim			1.5		A
Oscillator Frequency	Fosc		380	480	580	KHz
Turn-back frequency	Fsw-f	Vfb=0V		150		KHz
Under-voltage on voltage	Vuvlo-r		2.9	3.3	3.73	V
Under-voltage lockout	Vuvlo-f		2.65	3.05	3.45	V
Minimum Switch ON Time	Ton min			100		ns
Enable on voltage	Venr			1.35		V
Enable off  voltage	Venf			1.0		V
EN input current	Ien	Ven=2V		3.1		μA
		Ven=0V		0.1		μA
Quiescent Current	Iq	Ven=2V, Vfb=1V		0.73	0.86	mA
Shutdown Current	Is	Ven=0V		0.1	1.0	μA
Thermal Shutdown	Tsd			165		ºC