150KHz, Buck DC/DC Converter RS1509 Monolithic that design step-d
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RS1509
150KHz, Buck DC/DC Converter
RS1509 Monolithic that design step-down DC/DC Converter, ability driving load without additional transistor component. output version included 3.3V, adjustable type. operates switching frequency 150KHz thus allowing smaller sized filter components than what would needed with lower frequency switching regulators. Other features include guaranteed tolerance output voltage under specified input voltage output load conditions, ±15% oscillator frequency. Regarding protected function, thermal shutdown prevent over temperature operating from damage, current limit against over current operating output switch.
8-Lead Plastic DIP-8 Package Code:
8-Lead Plastic SOP-8 Package Code:
Features
3.3V, adjustable Adjustable version output voltage range: 1.4-37V over line load conditions 150KHz ±15% fixed switching frequency shutdown capability Operating voltage Output load current: SOP-8 DIP-8 packages power standby mode Thermal-shuntdown current-limit protection High efficiency Built-in switching transistor chip, requires only external components
Applications
Simple High-efficiency step-down regulator Positive negative converter On-card switching regulators
Connections
Pin1: Operating Voltage Input Pin2: Switch Output Pin3: Output Voltage Feedback Control
Pin5: Ground Pin6: Ground Pin7: Ground Pin8: Ground
Pin4: ON/OFF Shutdown
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Connections
Current Source Bias
220mV
1.235V Reference
2.5V Regulator
Start
200mV
COMP Current
Limit
COMP COMP 150KHz OSC.
COMP
Switch
Driver Thermal Limit
R1=2.5K
Output
Absolute Maxium Rating (Note1)
Parameter Supply Voltage On/Off Input Voltage Feedback Voltage Output Voltage Ground Power Dissipation Operating Temperature Storage Temperature Operating Junction Temperature Range Operating Voltage Symbol VOUT Topr Tstg Value -0.3~+25 -0.3~+25 Internally Limited 0~+70 -65~+150 -40~+125 +4.5~+40 Unit
Electrical Characteristics (Continued)
Specifications with boldface type apply over full operating temperature range, other type TJ=25
(Note
Part
Parameter Output Voltage Efficiency
Symbol VOUT VOUT VOUT
Conditions 4.75VVIN40V, 0.2AILOAD2A VIN=12V, ILOAD=2A 7VVIN40V, 0.2AILOAD2A VIN=12V, ILOAD=2A 15VVIN40V, 0.2AILOAD2A VIN=25V, ILOAD=2A 4.5VVIN40V, 0.2AILOAD2A VOUT programmed VIN=12V, VOUT=3V, ILOAD=2A
Min. 3.168 3.135 4.800 4.750 11.52 11.40 1.193
Typ. Max. (Note3) (Note4) 12.0 1.23 3.342 3.465 5.200 5.250 12.48 12.60 1.267 1.280
Unit
RS1509-3.3
RS1509-5.0
Output Voltage Efficiency
RS1509-12
Output Voltage Efficiency
RS1509-ADJ
Reference Voltage Efficiency
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Output Voltage Versions Electrical Characteristics
Specifications with boldface type apply over full operating temperature range, other type TJ=25 (Unless otherwise specified, VIN=12V 3.3V, adjustable version VIN=18V version, ILOAD=500mA)
Parameter Device Parameters Feedback Bias Current Oscillator Frequency Saturation Voltage Max. Duty Cycle (ON) Min. Duty Cycle (OFF) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current
Symbol
Test Condition
Min.
Typ.
Max. -100
Unit
VSAT ISTBY
Adjustable Version Only, VFB=1.3V
(Note
IOUT=2A (Note 6,7)
(Note (Note
Peak Current (Note 6,7) Output=0V
(Note (Note 6,8)
ON/OFF pin=5V (Note DIP-8 SOP-8 DIP-8 SOP-8 Junction Case Junction ambient
Thermal Resistance ON/OFF Control ON/OFF Logic Input Threshold Voltage ON/OFF Input Current
(Note
(Regulator High (Regulator OFF) VLOGIC=2.5V (Regulator OFF) VLOGIC=0.5V (Regulator
-0.02
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device intended functional, guarantee specific performance limits. guaranteed specifications test conditions, Electrical Characteristics. Note External components such catch diode, inductor, input output capacitors, voltage programming resistors affect switching regulator system performance. Note Typical numbers represent most likely norm. Note limits guaranteed room temperature (standard type face) temperature extremes (bold type face). room temperature limits 100% production tested. limits temperature extremes guaranteed correlation using standard Statistical Quality Control (SQC) methods. limits used calculate Average Outgoing Quality Level (AOQL). Note switching frequency reduced when second stage current limit activated. Note diode, inductor capacitor connected output pin. Note Feedback removed from output connected force output transistor switch Note Feedback removed from output connected 3.3V, ADJ. version, version, force output transistor switch OFF. Note VIN=40V. Note Junction ambient thermal resistance. (With copper area approximately
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Characteristics Curve
Normalized Output Voltage
VIN=12V ILOAD=200mA
Shutdown Quiescent Current
Output Voltage Change (%).
Current (uA)
VON/VOFF=5V TJ=25
-0.5
-1.5
Supply Voltage
Junction Temperature
Switch Current Limit
6.00 5.90
1.30 VIN=12V TJ=25oC 1.20
Switch Saturation Voltage
Switch Current Limit
5.70 5.60 5.50 5.40 5.30 5.20
Saturation Voltage
5.80
1.10
VIN=12V VOUT
1.00
0.90
0.80
Junction Temperature
Switch Current
On/Off Current (Sinking)
Vin=22V Current (uA)
Tj=25
On/Off Voltage
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Typical Application Circuit
Fig.1 Fixed Type Circuit
680uF
RS1509
Output
Output 33uH 1N5825 220uF
Fig.2 Adjustable Output Voltage Versions
680uF
RS1509
Adjustable Output
Output 47uH 1N5825 220uF
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DIP-8 Dimension
Min. 6.29 9.22 3.25 3.17 0.38 2.28 7.49 8.56 0.229 Max. 6.40 9.32 *1.52 *1.27 *0.99 3.35 3.55 0.53 2.79 7.74 *3.00 8.81 0.381
Typical, Unit:
8-Lead DIP-8 Plastic Package Package Code:
SOP-8 Dimension
Min. 4.85 3.85 5.80 1.22 0.37 3.74 1.45 4.80 0.05 0.30 0.19 0.37 0.23 0.08 0.00 Max. 5.10 3.95 6.20 1.32 0.47 3.88 1.65 5.10 0.20 0.70 0.25 0.52 0.28 0.13 0.15
Pin1 Index
Part
Part
Typical, Unit:
8-Lead SO-8 Plastic Surface Mounted Package Package Code:
Ordering Information
Part Number RS1509S-ADJ RS1509S -3.3 RS1509S -5.0 RS1509S Package SOP-8 SOP-8 SOP-8 SOP-8 Part Number RS1509P-ADJ RS1509P -3.3 RS1509P -5.0 RS1509P Package DIP-8 DIP-8 DIP-8 DIP-8
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Soldering Methods Orister's Products
Storage environment: Temperature=10oC~35oC Humidity=65%±15% Reflow soldering surface-mount devices Figure Temperature profile
Ramp-up Tsmax Temperature Critical Zone
Tsmin Preheat
Ramp-down
25oC Peak Time
Profile Feature Average ramp-up rate Preheat Temperature (Tsmin) Temperature (Tsmax) Time (min max) (ts) Tsmax Ramp-up Rate Time maintained above: Temperature (TL) Time (tL) Peak Temperature (TP) Time within actual Peak Temperature (tP) Ramp-down Rate Time 25oC Peak Temperature Flow (wave) soldering (solder dipping) Products devices. Pb-Free devices.
Sn-Pb Eutectic Assembly C/sec 100oC 150oC 60~120 <3oC/sec
Pb-Free Assembly <3oC/sec 150oC 200oC 60~180 <3oC/sec 217oC 60~150 260oC +0/-5oC 20~40 <6oC/sec minutes
60~150 +0/-5 10~30 <6oC/sec minutes
Peak temperature 260oC +0/-5oC
Dipping time 5sec ±1sec 5sec ±1sec
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Important Notice:
rights reserved. Reproduction whole part prohibited without prior written approval Orister Corporation. Orister Corporation reserves right make changes products without notice. Orister Corporation products warranted suitable Life-Support Applications, systems. Orister Corporation assumes liability consequence customer product design, infringement patents, application assistance.
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