Document
NJU7261 Series
C-MOS STEP-UP SWITCHING REGULATOR
■ GENERAL DESCRIPTION The NJU7261 series is a C-MOS step-up switching regulator
which contains accurate voltage reference, error amplifier, CR oscillator, control circuit, switching transistor, diode and resistor.
The stand-by function is effective for low power consumption. The regulation voltage is fixed by internal circuits and the following line-up of different output voltages version are available. This series is suitable for portable equipment's or battery operated items because of its small packaged outline, low operating voltage and current.
■ PACKAGE OUTLINE NJU7261U1 - **
■ FEATURES
• Low Operating Voltage
(1.0V min.)
• Low Operating Current
(5.0µA typ. / VOUT = 3.0V)
• Low Stand-by Current
(0.2µA max. / VOUT = 3.0V)
• High Precision Output Voltage (±3% max.)
• Wide Operating Voltage Range
• Stand-by Function
• CR Oscillator On-chip
• Diode On-chip
• Package Outline
SOT89-5
• C-MOS Technology
■ PIN CONFIGULATION
■ LINE-UP
■ EQUIVALENT CIRCUIT
Output Voltage (V) 3.0 3.3 5.0
Line-Up NJU7261U1-30 NJU7261U1-33 NJU7261U1-50
■ TERMINAL DESCRIPTION No. Term. Name 1 CONT 2 GND
I/O I POWER
3 STB
I
4 VIN POWER
5 VOUT
O
FUNCTION
External Inductor Connect Terminal Power Source (GND) Strobe Terminal : "H" or OPEN···Normal Operation (step-up)
" L" ···Standp-By Operation Power Source (+) Step-up Output Terminal
Ver.2010-04-14
-1-
NJU7261 Series
■ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
(Ta = 25ºC)
UNIT
Input Voltage CONT Input Voltage Strobe Input Voltage Output Voltage Power Dissipation Operating Temperature Range Storage Temperature Range
VIN VCONT VSTB VOUT
PD Topr Tstg
10 GND-0.3 ≤ VCONT ≤ 10 GND-0.3 ≤ VSTB ≤ VIN GND-0.3 ≤ VOUT≤ 10
300 -25 to + 75 -40 to +125
V V V V mW ºC ºC
Note1) When a coil used. This IC of VCONT possible over the absolute maximum ratings. Consequently please conduct enough to test.
Note2) The CONT input voltage (VCONT) should be inspected at the real application circuit, as some kinds of coils make the CONT input voltage exceed the Absolute Maximum Rating of the VCONT.
■ ELECTRICAL CHARACTERISTICS +3.0V Version
PARAMETER
SYMBOL
Input Voltage Start Voltage Oscillator Freq. Output Voltage
Input Stability
VIN VSTART fOSC VOUT
∆VOUT1
Load Stability Operating Current Stand-by Current Switching Current STB Terminal
Input Voltage
STB Terminal Input Current
∆VOUT2
ISS
IQ
H level L level
ISI
H level
L level
VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2
CONDITION
NO LOAD VIN = 1.5V VIN = 1.5V, IOUT = 20mA VIN = 1.5V to 2.0V IOUT = 20mA VIN = 1.5V IOUT = 10µA to 25mA VIN = VSTB = 1.5V, NO LOAD VIN = 1.5V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 1.5V VIN = 1.5V VIN = 1.5V, VSTB = 1.0V VIN = 1.5V, VSTB = 1.5V VIN = 1.5V, VSTB = 0.4V VIN = 1.5V, VSTB = 0V
MIN. 20
2.91
-
-
-
-
1.0 -
NORM TYP.
30 3.0
30
MAX. 5.0 1.0 50 3.09
100
30 100
5.0 10
- 0.2
250 -- 0.4 15 30
0.1 15 30 0.1 -
(Ta = 25°C)
UNIT
MEASUREMENT CIRCUIT
V1 V1 kHz 2 V1
mV 1
mV 1
µA 3
µA 4
mA V5 V5 µA 6 µA 6 µA 6 µA 6
-2-
Ver.2010-04-14
NJU7261 Series
+3.3V Version
PARAMETER
Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability
Load Stability Operating Current Stand-by Current Switching Current STB Terminal
Input Voltage
STB Terminal Input Current
SYMBOL
VIN VSTART fOSC VOUT
∆VOUT1
∆VOUT2
ISS
IQ
H level L level
ISI
H level
L level
VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2
CONDITION
NO LOAD VIN = 1.5V VIN = 1.5V, IOUT = 20mA VIN = 1.5V to 3.0V IOUT = 20mA VIN = 1.5V IOUT = 10µA to 25mA VIN = VSTB = 1.5V, NO LOAD VIN = 1.5V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 1.5V VIN = 1.5V VIN = 1.5V, VSTB = 1.0V VIN = 1.5V, VSTB = 1.5V VIN = 1.5V, VSTB = 0.4V VIN = 1.5V, VSTB = 0V
MIN. 20
3.20
-
-
-
-
1.0 -
NORM TYP.
30 3.30
30
MAX. 5.0 1.0 50 3.40
100
30 100
5 10
- 0.2
250 -- 0.4 15 30
0.1 15 30 0.1 -
(Ta = 25°C)
UNIT
MEASUREMENT CIRCUIT
V1 V1 kHz 2 V1
mV 1
mV 1
µA 3
µA 4
mA V5 V5 µA 6 µA 6 µA 6 µA 6
+4.5V Version
PARAMETER
Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability
Load Stability Operating Current Stand-by Current Switching Current STB Terminal
Input Voltage
STB Terminal Input Current
SYMBOL
VIN VSTART fOSC VOUT
∆VOUT1
∆VOUT2
ISS
IQ
H level L level
ISI
H level
L level
VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2
CONDITION
NO LOAD VIN = 3.0V VIN = 3.0V, IOUT = 20mA VIN = 2.0V to 3.0V IOUT = 20mA VIN = 3.0V IOUT = 10µA to 25mA VIN = VSTB = 3.0V, NO LOAD VIN = 3.0V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 3.0V VIN = 3.0V VIN = 3.0V, VSTB = 2.4V VIN = 3.0V, VSTB = 3.0V VIN = 3.0V, VSTB = 0.4V VIN = 3.0V, VSTB = 0V
MIN. 20
4.36
-
-
-
-
2.4 -
NORM TYP.
30 4.50
30
MAX. 4.5 1.0 50 4.64
100
30 100
5 15
- 0.2
250 -- 0.4 50 100
0.1 50 100 0.1 -
(Ta = 25°C)
UNIT
MEASUREMENT CIRCUIT
V1 V1 kHz 2 V1
mV 1
mV 1
µA 3
µA 4
mA V5 V5 µA 6 µA 6 µA 6 µA 6
Ver.2010-04-14
-3-
.