AP5726WG-7

(Top View)

White LED Step-Up DC/DC Converter

The AP5726WG-7 is a white led step-up dc/dc converter from Diodes Incorporated. (Top View). View the full AP5726WG-7 datasheet below including key specifications, pinout, electrical characteristics, absolute maximum ratings.

Manufacturer

Diodes Incorporated

Key Specifications

Parameter	Value
Efficiency	84% (typical)
Feedback Voltage	0.31V (typical)
Shutdown Current	0.1 µA (typical)
Quiescent Current	500 µA (typical)
Input Voltage Range	2.7V to 5.5V
Switching Frequency	1.2 MHz (typical)
Maximum Switching Current Limit	750 mA (typical)
Operating Ambient Temperature Range	-40°

Overview

Part: AP5726 from Diodes Incorporated

Type: White LED Step-Up DC/DC Converter

Description: Step-up DC/DC converter designed to drive 2-6 white LEDs in series from a Li-Ion cell, featuring 1.2MHz switching frequency, 0.31V feedback voltage, and 84% typical efficiency.

Operating Conditions:

Supply voltage: 2.7–5.5 V
Operating temperature: -40 to 125 °C (Junction)
Switching frequency: 1.0–1.4 MHz

Absolute Maximum Ratings:

Max supply voltage: 7 V (VIN Pin)
Max switching voltage: 34 V (SW Pin)
Max junction temperature: 150 °C
Max storage temperature: -65 to +150 °C

Key Specs:

Operating Input Voltage (VIN): 2.7–5.5 V
Operating Frequency (FOSC): 1.2 MHz (Typ.)
Feedback Voltage (VFB): 0.31 V (Typ.)
On Resistance of MOSFET (Rds(on)): 0.95 Ω (Typ.)
Switching Current Limit (IOCP): 750 mA (Typ.)
OVP Threshold (VOVP): 30 V (Typ., SOT26)
Efficiency: 84% (Typ.)
Quiescent Current (IQ): 500 μA (Typ., FB=0.41V, No Switching)

Features:

High efficiency: 84% typical
Fast 1.2MHz switching frequency
Current limit and UVLO protections
Internal Thermal Shutdown
Internal Over Voltage Protection
Integrated soft-start function
Available in "Green" Molding Compound
Lead Free Finish/ RoHS Compliant

Applications:

Cellular Phones
PDAs, Hand help Computers
Digital Cameras
MP3 Players
GPS Receivers

Package:

SOT26
TSOT23-6
DFN2020C-6

Features

High efficiency: 84% typical
Fast 1.2MHz switching frequency
Current limit and UVLO protections
Internal Thermal Shutdown
Internal Over Voltage Protection
Integrated soft-start function
SOT26, TSOT23-6 and DFN2020C-6: Available in "Green" Molding Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)

Applications

Cellular Phones
PDAs, Hand help Computers
Digital Cameras
MP3 Players
GPS Receivers

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead\_free.html.

Pin Configuration

AP5726WG-7 Pinout

Package: SOT26 (TSOT23-6)

Pin Number	Pin Name	Type	Description
1	SW	O	Switch output
2	GND	P	Ground
3	FB	I	Feedback input
4	EN	I	Enable control
5	OVP	I	Over-voltage protection input
6	VIN	P	Input supply voltage

Notes

Power pins (P): VIN (pin 6), GND (pin 2)
Input pins (I): FB (pin 3), EN (pin 4), OVP (pin 5)
Output pins (O): SW (pin 1)
Pin diagram shows SOT26/TSOT23-6 package with 6 pins in standard arrangement (pins 1–3 on left, pins 4–6 on right, top view)

Electrical Characteristics

Symbol	Parameter	Conditions	Min	Typ.	Max	Unit
	System Supply Input
VIN	Operating Input Voltage		2.7	-	5.5	V
UVLO	Under Voltage Lockout		-	2.2	2.4	V
	Under Voltage Lockout Hysteresis		-	85	-	mV
IQ	Quiescent Current	FB=0.41V, No Switching	-	500	-	μA
ISD	Shutdown Current	VEN < 0.4V	-	0.1	1	μA
Oscillator
FOSC	Operation Frequency		1	1.2	1.4	MHz
Dmax	Maximum Duty Cycle		86	90	-	%
Reference Voltage
VFB	Feedback Voltage		0.279	0.31	0.341	V
IFB	FB Pin Bias Current		10	45	100	nA
MOSFET
Rds(on)	On Resistance of MOSFET		-	0.95	1.2	Ω
IOCP	Switching Current Limit Control and Protection	Normal Operation	-	750	-	mA
EN	Voltage High	ON	1.5	-	-	V
EN	Voltage Low	OFF	-	-	0.4	V
IEN	EN Pin Pull Low Current		-	4	6	μA
OVP	OVP Threshold	SOT26 (Note 2)	26	30 162	34	V
θJA	Thermal Resistance Junction-to Ambient	TSOT23-6 (Note 2) DFN2020C-6 (Note 2) SOT26 (Note 2)		152 200 36		o C/W
θJC	Thermal Resistance Junction-to Case	TSOT23-6 (Note 2) DFN2020C-6 (Note 2)		32 30		o C/W

Absolute Maximum Ratings

Symbol	Parameter	Rating	Unit
VIN	VIN Pin Voltage	-0.3~7	V
VSW	SW Voltage	-0.3~34	V
VOVP	OVP Pin Voltage	-0.3~35	V
VFB	Feedback Pin Voltage	-0.3~7	V
EN	EN	-0.3~7	V
TJ(MAX)	Maximum Junction Temperature	150	o C
TLEAD	Lead Temperature	300	o C
TST	Storage Temperature Range	-65 to +150	o C

Caution: Operation above the absolute maximum ratings can cause device failure. These values, therefore, must not be exceeded under any condition. Operation at the absolute maximum rating for extended periods, may reduce device reliability.

Recommended Operating Conditions

Symbol	Parameter	Min	Max	Unit
VIN	Input Voltage	2.7	5.5	V
TJ	Operating Junction Temperature	-40	125	o C
TA	Operating Ambient Temperature	-40	85	o C

Typical Application

Figure 1. Typical Application Circuit

Package Information

(1) Package Type: SOT26

(2) Package Type: TSOT23-6

Ordering Information

Device	Package	Packing
AP5726WG-7	SOT26	3000/Tape & Reel
AP5726WUG-7	TSOT23-6	3000/Tape & Reel
AP5726FDCG-7	DFN2020C-6	3000/Tape & Reel

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
AP5726	Diodes Incorporated	—
AP5726FDCG-7	Diodes Incorporated	DFN2020C-6
AP5726WUG-7	Diodes Incorporated	TSOT23-6

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