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PJ3800 Dataheets PDF



Part Number PJ3800
Manufacturers Promax-Johnton Semiconductor
Logo Promax-Johnton Semiconductor
Description Low Voltage Switching Regulator Controller
Datasheet PJ3800 DatasheetPJ3800 Datasheet (PDF)

m Low Voltage o .c U 4 he PJ3800 is a single-channel t switching regulator e control IC for low voltage e applications incorporating a h soft start function and short circuit detection function. S a The device has a low t minimum operating voltage of 1.8 V and a is ideal for the power supply of battery-operated electronic D equipment.. w . w FEATURES w PJ3800 Switching Regulator Controller T SOP-8 TSSOP-8 z z z z z z z z Wide supply voltage operating range: 1.8 to 15 V operation, 1 mA or l.

  PJ3800   PJ3800



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m Low Voltage o .c U 4 he PJ3800 is a single-channel t switching regulator e control IC for low voltage e applications incorporating a h soft start function and short circuit detection function. S a The device has a low t minimum operating voltage of 1.8 V and a is ideal for the power supply of battery-operated electronic D equipment.. w . w FEATURES w PJ3800 Switching Regulator Controller T SOP-8 TSSOP-8 z z z z z z z z Wide supply voltage operating range: 1.8 to 15 V operation, 1 mA or less in stand-by Low current consumption: Typically 5.5 mA in High speed operation is possible: Maximum 1 MHz peripheral components are minimized. Incorporates a soft start circuit. circuit (SCP). The error amplifier gain is set inside the IC, so Incorporates a timer-latch type short circuit detection Totem-pole type output with adjustable on/off current (for NPN transistors) Incorporates a stand-by function. BLOCK DIAGRAM m o .c U 4 t e e h S a t a .D w w w ORDER INFORMATION Device Operation Temperature -20 ~ +85℃ PJ3800CS PJ3800CA Pin 1. Error amplifier inverting input 2. Soft Star & SCP 3. Power supply 4. Output current setting and control 5. Output 6. Ground 7. Oscillation frequency 8. Error amplifier output Package SOP-8 TSSOP-8 m o .c U 4 t e e h S a at .D w w w 2003/04.rev.A 1-8 PJ3800 Low Voltage Switching Regulator Controller ABSOLUTE MAXIMUM RATINGS Parameter Power supply voltage Output source current Output sink current Allowable dissipation Operating temperature Storage temperature Symbol VCC IO+ IOPD Top Tstg Rated Value Min. — — — — -30 -55 Max. 16 -50 50 570* +85 +125 Unit V mA mA mW ℃ ℃ * : When mounted on a 10 cm square double-sided epoxy board WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings. RECOMMENDED OPERATING CONDITIONS Values Min. 1.8 –0.2 –0.2 –40 — — — 150 1 100 10 –30 Typ. — — — — — 0.1 0.1 390 3 270 500 +25 Max. 15 1 VCC — 40 — — 5000 10 10000 1000 +85 Parameter Power supply voltage Error amplifier input voltage BR/CTL pin input voltage Output source current Output sink current SCP pin capacitance Phase compensation capacitance Output current setting resistance Timing resistance Timing capacitance Oscillation frequency Operating temperature Symbol VCC VI VBR IO+ IO– CPE CP RB RT CT fOSC TOP Unit V V V mA mA μF μF Ω kΩ pF kHz ℃ WARNING: Recommended operating conditions are normal operating ranges for the semiconductor device. All the device’s electrical characteristics are warranted when operated within these ranges. Always use semiconductor devices within the recommended operating conditions. Operation outside these ranges may adversely affect reliability and could result in device failure. No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their Promax Johnton representative beforehand. 2-8 2003/04.rev.A PJ3800 Low Voltage Switching Regulator Controller ELECTRICAL CHARACTERISTICS (VCC = +2 V, Ta = +25 °C) Parameter Circuit to prevent Reset voltage malfunction at low input voltage (U.V.L.O.) Threshold voltage Charging current Soft start Voltage at soft start completion Short circuit detection (S.C.P.) Saw tooth wave oscillator (OSC) Charging current Threshold voltage Oscillation frequency Frequency input stability Frequency variation with temperature Input threshold voltage VT input stability VT variation with temperature Input bias current Error amplifier Voltage gain Frequency bandwidth Maximum output voltage range Output source current Output sink current Idle period adjustment section Maximum duty cycle Symbol V VTH ICS VtS ICPC VtPC fOCS fdV fdT VT VTdV VTdT IB AV BW VOM+ VOMIOM+ IOMtDUTY VOH1 VOH2 Output voltage Output section Output source current Output sink current Pull down resistance Pin voltage Output current setting section/ Control section Input off condition Input on condition Pin current range Entire device Stand-by current Average supply current t VOL1 VOL2 IO+ IORO VBR IOFF ION IBR ICCS ICC BR/CTL pin open or VCC RB = 390Ω — Condition — VSCP = 0 V — VSCP = 0 V — RT=3.0kΩ, CT = 270 pF VCC = 2 V to 15 V Ta =-20℃ to +85℃ VFB = 450 mV VCC = 2 V to 15 V Ta =-20℃ to +85℃ VIN = 0 V — AV = 0 dB — VFB = 0.45 V RT=3.0kΩ,CT =270pF VFB =0.8V RB = 390ΩIO =-15mA RB=750Ω,VCC=1.8V IO = -10mA RB = 390Ω,IO=15mA RB = 750Ω VCC=1.8V IO = 10mA RB = 390Ω VO = 0.9V RB = 390Ω VO = 0.3V — RB = 390Ω Value Min. — 1.1 -0.5 0.7 -1.5 0.7 400 — — 480 — — -1.0 70 — 0.78 — — 24 65 1.0 0.8 — — — 30 20 0.2 -20 — -1.8 — — Typ. — 1.3 -1.0 0.8 -1.0 0.8 500 2 5 500 5 1 -0.2 100 6 0.87 0.05 -40 40 75 1.2 1 0.1 0.1 -30 60 30 0.3 — — — — 5.5 Max. 0.9 1.5 -0.7 0.9 -0.7 0.9 600 10 — 520 20 — 1.0 145 — — 0.2 -24 — 85 — — 0.2 0.2 -20 — 40 0.4 0 -45 -0.1 1 9.3 Unit V V μA V μA V kHz % % mV mV % μA V/V MHz V V μA μA % V .


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