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参数资料
| 型号： | RP504K251D-E2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | 0.9 A SWITCHING CONTROLLER, 2550 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 1.20 X 1.60 MM, HALOGEN FREE AND ROHS COMPLIANT, DFN-6 |
| 文件页数： | 1/29页 |
| 文件大小： | 996K |
| 代理商： | RP504K251D-E2 |
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RP504x SERIES
600mA
Step-down DC/DC Converter with Synchronous Rectifier
NO.EA-259-110530
1
OUTLINE
The RP504x Series are low supply current CMOS-based 600mA
step-down DC/DC Converters with
synchronous rectifier. Each of these ICs consists of an oscillator, a reference voltage unit, an error amplifier, a
switching control circuit, a mode control circuit(Ver.A, D), a soft-start circuit, a "latch type" protection circuit, an
under voltage lockout (UVLO) circuit, and switching transistors. A low ripple, high efficiency synchronous rectifier
step-down DC/DC converter can be easily composed of this IC with only an inductor and capacitors. Since
packages are SOT-23-5, DFN1616-6B, DFN(PLP)1216-6F, high density mounting on boards is possible.
As protection circuits, the RP504x Series contain a current limit circuit which limits the Lx peak current in each
clock cycle, and a latch type protection circuit which latches the built-in driver to the OFF state if the load current
exceeds the limit value or the output short continues for a specified time (the protection delay time). The latch
protective circuit can be released by once putting the IC into the standby mode with the CE pin and then into the
active mode, or, by turning the power off and back on. Setting the supply voltage lower than the UVLO detector
threshold can also release the latch protective circuit.
In terms of the output voltage, since the feedback resistances are built-in, the voltage is fixed internally. 0.1V
step output can be set by laser-trim and
±1.5% or ±18mV tolerance depending on the output voltage is
guaranteed. By inputting a signal to a MODE pin, the RP504x Series can be switched between PWM/VFM auto
switching control and Forced PWM control. PWM/VFM auto switching control switches to high-efficiency VFM
mode in low output current. Forced PWM control switches to fixed-frequency Forced PWM mode for reducing
noise in low output current.
)This is an approximate value, because output current depends on conditions and external parts.
FEATURES
Supply Current ...................................................... Typ. 25μA(at VFM mode, at no load)
Standby Current .................................................... Max. 5μA
Input Voltage Range ............................................. 2.3V to 5.5V (VOUT≧1.0V)
Output Voltage Range........................................... 0.8V to 3.3V (With a 0.1V step)
Output Voltage Accuracy....................................... ±1.5% (VOUT≥1.2V), ±18mV (VOUT<1.2V)
Temperature-Drift Coefficient of Output Voltage ... Typ. ±40ppm/°C
Oscillator Frequency ............................................. Typ. 2.25MHz
Oscillator Maximum Duty Cycle............................ Min. 100%
Built-in Driver ON Resistance ............................... Typ. Pch. 0.34、Nch. 0.43(VIN=3.6V)
UVLO Detector Threshold..................................... Typ. 2.0V
Soft Start Time....................................................... Typ. 0.15ms
LX Current Limit ..................................................... Typ. 900mA
Latch type Protection Circuit................................. Typ. 1.5ms
Auto discharge function ........................................ Only for D Version
Two choices of Switching Mode............................ DFN1616-6B and DFN(PLP)1216-6F are available in
adjustable switching control options from PWM/VFM auto switching type or Forced PWM type by using
MODE pin. SOT-23-5 is available in fixed switching control options: PWM/VFM auto switching type for B
version or Forced PWM type for C version.
Packages .............................................................. SOT-23-5, DFN1616-6B, DFN(PLP)1216-6F
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相关代理商/技术参数 |
参数描述 |
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| RP-505D | 制造商:RECOM 制造商全称:Recom International Power 功能描述:1 Watt SIP7 SIP7 Single & Dual Output |
| RP-505S | 制造商:RECOM 制造商全称:Recom International Power 功能描述:1 Watt SIP7 SIP7 Single & Dual Output |
| RP-509D | 制造商:RECOM 制造商全称:Recom International Power 功能描述:1 Watt SIP7 SIP7 Single & Dual Output |
| RP-509S | 制造商:RECOM 制造商全称:Recom International Power 功能描述:1 Watt SIP7 SIP7 Single & Dual Output |
| RP50GB | 制造商:Superior Electric 功能描述:Electrical Connector; Pin Receptacle; 0.25 in.; 1.25 in.; 0.25 in. (Max.); 50 A 制造商:Superior Electric 功能描述:RECEPTACLE PIN 50A BLACK 制造商:Superior Electric 功能描述:RECEPTACLE, PIN, 50A, BLACK 制造商:Superior Electric 功能描述:TEST RECEPTACLE, PIN-RCPT, 50A, WW, BLK; Series:RP50; Gender:Receptacle; Voltage Rating:250V; Current Rating:50A; Connector Mounting:Cable; Contact Termination:Wire Wrap; Body Material:Nylon Plastic; Color:Black ;RoHS Compliant: Yes 制造商:Superior Electric 功能描述:Conn Binding Post PIN 1 POS ST Panel Mount 1 Port |
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