Cyh8118 Sot23-5 Synchronous Step-up DC-DC Converter with Pfm Control IC

• Customization: Available
• Conductive Type: Unipolar Integrated Circuit
• Integration: GSI
• Model NO.: CYH8118
• Package: Sot23-5
• Manner of Packing: Reel
• Devices Per Bag/Reel: 3000PCS
• Ship by: DHL/FedEx/ UPS
• Lead Time: 7 Working Days After Receiving Payment
• shape: Flat
• Trademark: CY
• Origin: China
• HS Code: 8542399000
• Production Capacity: 200000PCS/Year

Product Description

General Description

The CYH8118 Series is a Synchronous step-up DC/DC Converter with PFM Control. With the CYH8118 Series, a step-up switching DC/DC converter can be configured by using an external coil, capacitor. The built-in MOSFET is turned off by a protection circuit when the voltage at the LX pin exceeds the limit to prevent it from being damaged.


Features

• External parts: Coil, capacitor
• Output voltage: 2.1V to 5.5V
• Maximum Oscillation frequency :300KHz
• Accuracy of ±2%
• High efficiency: 95%
• Package: SOT23-5 and SOT89

Applications    

• Digital cameras
• Electronic notebooks and PDAS
• Portable CD/MD players
• Cameras , video equipment
• Communications equipment
• Power supply for microcomputers

Electrical Characteristics
(Unless otherwise specified, Ta = 25ºC)

PARAMETER	SYMBOL	MIN	TYP	MAX	UNITS	CONDITION
Output Voltage	VOUT	VOUT (S) ×0.98	VOUT	VOUT (S) ×1.02	V	-
Input Voltage	VIN	-	-	7.5	V	-
Operation Start Voltage	VST1	-	-	0.9	V	IOUT=1mA, VOUT=2.2V~4.2V
Operation Start Voltage	VST1	-	-	1.2	V	IOUT=1mA, VOUT=4.2V~5.5V
Input Current At No Load	ISS	-	15	25	uA	VIN=1.8V, VOUT=3.0V
		-	25	35	uA	VIN=0.9V, VOUT=3.0V
Current Consumption 2	ISS2	-	6	10	uA	VOUT=VOUT(s)+ 0.5V
Current Consumption During Shutdown	ISSS	-	-	1.0	uA	VEN=0V
Maximum Oscillation Frequency	fosc		300		KHz	VOUT=0.95xVOU T(s), measure Waveform at LX pin
Duty Ratio1	Duty1	70	78	85	%	VOUT=0.95xVOU T(s)
Efficiency	EFF1		90		%
Shutdown Pin Input Voltage	VSH	0.75	-	-	V	VOUT=0.95xVOU T(s), judge Oscillation at LX pin
	VSL1	-	-	0.3	V	VOUT=0.95xVOU T(s), judge stop at LX pin
Shutdown Pin input Current	ISH	-0.1	-	0.1	uA	VEN=6V
	ISL	-0.1	-	0.1	uA	VEN=0V

Remark: VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage



Application Circuits