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NJU7601

JRC
Part Number NJU7601
Manufacturer JRC
Description Step-Up/Flyback Switching Regulator IC
Published Jun 12, 2009
Detailed Description NJU7601 Step-Up/Flyback Switching Regulator IC with Power Saving PWM/PFM control ■GENERAL DESCRIPTION The NJU7601 is a...
Datasheet PDF File NJU7601 PDF File

NJU7601
NJU7601

Overview
NJU7601 Step-Up/Flyback Switching Regulator IC with Power Saving PWM/PFM control ■GENERAL DESCRIPTION The NJU7601 is a low voltage operation high-speed switching regulator control IC for step-up and fly-back converter, with PWM/PFM switching control.
It can improve a switching efficiency on light load with automatically changing between PWM and PFM controls, and incorporates a totem pole output, which can drive an external MOS-FET easily.
The NJU7601 also has a soft-start function, dead time control and timer latch for short circuit protection and their times are all adjustable with external parts.
It is available in 8-lead DMP and MSOP (TVSP) packages.
It is suitable for battery powered applications.
■PACKAGE OUTLINE NJU7601M (DMP8) NJU7601RB1 (MSOP8(TVSP8)) ■FEATURES ● Automatic PWM/PFM Control ● Operating Voltage 2.
2V to 8V ● Wide Oscillator Range 300kHz to 1MHz ● Maximum Duty Cycle 90% typ.
● Quiescent Current ● Soft-Start Function 800µA typ.
Internal : 16ms typ.
or adjustable ● Dead Time Control ● Timer Latch for Short Circuit Protection ● C-MOS Technology ● Package Outline NJU7600M : DMP8 NJU7600RB1 : MSOP8 (TVSP8)* *MEET JEDEC MO-187-DA / THIN TYPE ■PRODUCT VARIATION NJU760x** Standby Function PWM/PFM NJU7601 PWM/PFM Light Load to Efficiency NJU7600 PWM Control ** Planning ■PIN CONFIGURATION 1 2 3 4 NJU7601M NJU7601RB1 8 7 6 5 PIN FUNCTION 1.
V+ 2.
FB 3.
IN 4.
SCP 5.
DTC 6.
RT 7.
GND 8.
OUT Ver.
2012-08-03 -1- NJU7601 ■BLOCK DIAGRAM FB IN1V Vref V+ ER⋅AMP Soft Start Latch UVLO SCP 1V 2µA SCP 2kΩ 0.
5 RT A 1V DTC 0.
8V 0.
2V PWM/PFM Control OSC 0.
5V PWM Buffer OUT 0.
74V RT RT GND -2- Ver.
2012-08-03 NJU7601 ■ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Output Pin Current Power Dissipation SYMBOL V+ IO PD Operating Temperature Range Storage Temperature Range TOPR TSTG MAXIMUM RATINGS +9 ±50 DMP8 :300 MSOP8 (TVSP8) :320 -40 to +85 -40 to +125 (Ta=25°C) UNIT V mA mW °C °C ■RECOMMENDED OPERATING CONDITI...


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