NJW4150
Internal 34V MOSFET Switching Regulator IC for Buck Converter
GENERAL DESCRIPTION The NJW4150 is a switching regulator IC for buck converter with 34V, 450mA MOSFET. It corresponds to high frequency oscillating, wide input voltage and Low ESR Output Capacitor (MLCC). Therefore, the NJW4150 can realize downsizing of applications with a few external parts. Also, it has a soft start function, over current protection and thermal shutdown circuit. It is suitable for power supply circuit of Car Accessory, Office Automation Equipment, Industrial Instrument and so on.
■ PACKAGE OUTLINE
NJW4150RB1
FEATURES Absolute Maximum Rating 42V Operating Voltage Range 6V to 34V Switching Current 450mA min. PWM switching control Applicable for Ceramic Capacitor (MLCC) Oscillation Frequency 1MHz typ. (A ver.) Soft Start Function 4ms typ. Over Current and Thermal Shutdown Protection Standby Function Package Outline NJW4150RB1 : TVSP8
■PIN CONFIGURATION
1 2 3 4 8 7 6 5
NJW4150RB1
PIN FUNCTION 1. SW 2. N.C. 3. V+ 4. ON/OFF 5. FB 6. IN7. N.C. 8. GND
Ver.2011-02-25
-1-
NJW4150
■BLOCK DIAGRAM
V+
ON/OFF
High: ON Low : OFF (Standby) Standby ON/OFF
UVLO
OCP
Pulse by Pulse
Low Frequency Control PWM ER⋅AMP OSC Buffer
FB IN-
SW
Vref 1.0V Soft Start TSD
GND
PRODUCT VERSION PART NUMBER NJW4150RB1-A Oscillation Frequency 1,000kHz
ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Supply Voltage V+ SW pin Voltage VSW IN- pin Voltage VINON/OFF pin Voltage VON/OFF Power Dissipation PD Junction Temperature Range Operating Temperature Range Storage Temperature Range Tj Topr Tstg
MAXIMUM RATINGS +42 +42 -0.3 ~ +6 +42 580 (*1) 780 (*2) -40 ~ +150 -40 ~ +85 -40 ~ +150
UNIT V V V V mW °C °C °C
(*1): Mounted on glass epoxy board based on EIA/JEDEC. (76.2mm × 114.3mm × 1.6mm: 2 Layers FR-4) (*2): Mounted on glass epoxy board based on EIA/JEDEC. (76.2 mm× 114.3 mm× 1.6mm: 4 Layers FR-4, Internal foil area: 74.2 × 74.2mm)
RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN. + Operating Voltage V 6
TYP. –
MAX. 34
UNIT V
-2-
Ver.2011-02-25
NJW4150
ELECTRICAL CHARACTERISTICS (V+=VON/OFF=24V, Ta=25°C) PARAMETER Under Voltage Lockout Block ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage Soft Start Block Soft Start Time Oscillator Block Oscillation Frequency Oscillation Frequency OCP operates Oscillate Supply Voltage Fluctuations Oscillate Temperature Fluctuations Error Amplifier Block Reference Voltage Input Bias Current PWM Comparator Block Maximum Duty Cycle Output Block Output ON Resistance Switching Current Limit SW Leak Current ON/OFF Block ON Control Voltage OFF Control Voltage General Characteristic Quiescent Current Standby Current IDD IDD_STB RL=No Load, VIN-= 0.9V, VFB=0.5V VON/OFF=0V – – 2.3 – 2.7 40 mA µA SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
VT_ON VT_OFF VHYS
V+ = L → H V+ = H → L
5.6 5.4 150
5.8 5.6 200
6.0 5.8 –
V V mV
TSS
VB=0.95V
2
4
8
ms
fOSC fOSC_LIM fDV fDT
A version VIN-=0.9V, VFB=0.5V VIN-=0V, VFB=0.5V V+=6V to 34V Ta=-40°C to +85°C
900 – – –
1,000 333 1 5
1,100 – – –
kHz kHz % %
VB IB
-1.0% -0.1
1.00 –
+1.0% 0.1
V µA
MAXDUTY
VIN-=0.9V
100
–
–
%
RON ILIM ILEAK
ISW=300mA VON/OFF=0V, V+=42V, VSW=0V
– 450 –
1.6 600 –
1.8 750 1
Ω mA µA
VON VOFF
VON/OFF= L → H VON/OFF= H → L
1.6 0
– –
V+ 0.3
V V
Ver.2011-02-25
-3-
NJW4150
TYPICAL APPLICATIONS
V
+
CIN
L
ON/OFF V
+
VOUT
SW
ON/OFF
High: ON Low: OFF (Standby)
NJW4150
CFB
FB INGND
R2
SBD
COUT
R1
CNF RNF
-4-
Ver.2011-02-25
NJW4150
■TYPICAL CHARACTERISTICS
Oscillation Frequency vs. Operating Voltage Oscillation Frequency fosc (kHz)
(mA) Switching Current Limit vs. Operating Voltage 750 700 650 600 550 500 450 0 10 20 30 + Operating Voltage V (V) 40 (Ta=25oC)
1100 1050 1000 950 900
(Ta=25oC)
0
10 20 30 + Operating Voltage V (V)
40
Soft Start Time vs. Operating Voltage 8 Soft Start Time Tss (ms) 7 6 5 4 3 2 0 10 20 30 + Operating Voltahe V (V) 40 (V =0.95V, Ta=25 C)
B o
Switching Current Limit I
LIM
Quiescent Current vs. Operating Voltage (mA) 4 3 2 1 0 (R =No Load, V =0.5V, Ta=25oC)
L IN-
Quiescent Current I
DD
0
10 20 30 + Operating Voltage V (V)
40
Error Amplifier Block Voltage Gain, Phase vs. Frequency 60 Voltage Gain Av (dB) (V =24V, Gain=40dB, Ta=25 C)
+ o
180
Gain 30 15 0 0.1 90 45 0 10000
1
10 100 1000 Frequency f (kHz)
Ver.2011-02-25
Phase Φ (deg)
45
Phase
135
-5-
NJW4150
■TYPICAL CHARACTERISTICS
Oscillator Frequency vs. Temperature (kHz)
(mA) Switching Current Limit vs. Temperature 750 700 650 600 550 500 450 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C) (V =24V)
+
1100 1050
(V+=24V)
OSC
1000 950 900 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
Soft Start Time vs. Temperature 8 Soft Start Time Tss (ms) 7 6 5 4 3 2 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C) (V =24V, V =0.95V)
B +
Switching Current Limit I
Oscillator Frequency f
LIM
Reference Voltage vs. Temperature 1.01 (V) 1.005 (V+=24V)
Reference Voltage V
B
1 0.995 0.99 -50
-25 0 25 50 75 100 125 o Ambient Temperature Ta ( C)
( Ω)
3 2.5 2 1.5 1 0.5
Output ON Resistance vs. Temperature (I SW =300mA) ( µA)
SW Leak Current vs. Temperature 0.1 0.08 0.06 0.04 0.02 0 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C) (V +=42V, V
ON/OFF
=0V, V
SW
=0V)
ON
Output ON Resistance R
V+=24V,34V
0 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
SW Leak Current I
LEAKH
V+=6V
-6-
Ver.2011-02-25
NJW4150
■TYPICAL CHARACTERISTICS
Quiescent Current vs. Temperature (RL= No Load, VIN-=0.5V) ( µA) Standby Current vs. Temperature (VON/OFF=0V) V+=34V V+=24V
4 (mA) 3 2
50 40 30 20 10
Quiescent Current I
V+=34V
V+=6V 1
V+=24V
Standby Current I
DD_STB
DD
V+=6V
0 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
0 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
6 Threshold Voltage (V) 5.9 5.8 5.7 5.6 5.5
Under Voltage Lockout Block vs. Temperature V
T_ON
VT_OFF
5.4 -50 -25 0 25 50 75 100 125 150 o Ambient Temperature Ta ( C)
Ver.2011-02-25
-7-
NJW4150 MEMO
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
-8-
Ver.2011-02-25
很抱歉,暂时无法提供与“NJW4150”相匹配的价格&库存,您可以联系我们找货
免费人工找货