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R2A20124AFP/R2A20124ASP Preliminary REJ03D0928-0200 Rev.2.00 Page 8 of 12 Aug 03, 2010 Electrical Characteristics (Ta = 25°C, Vcc = 12 V, RT = 180 k , Rdelay = 51 k, Rramp-slp = 27 k, unless otherwise specified.) Item Symbol Min Typ Max Unit Test Conditions SUPPLY: R2A20124AFP/ASP Start threshold VH 7.7 8.4 9.1 V Shutdown threshold VL 7.4 8.0 8.6 V UVLO hysteresis dVUVL 0.3 0.4 0.5 V Start-up current Is — 90 150 A Vcc = 7.5 V Operating current Icc — 8 11.5 mA No load on VREF pin VREF: R2A20124AFP/ASP Output voltage Vref 4.9 5.0 5.1 V Line regulation Vref-line — 0 10 mV Vcc= 10 V to 16 V Load regulation Vref-load — 6 20 mV Iref= –1 mA to –20 mA Temperature stability dVref/dTa — 80*1 — ppm/°C Ta = –40°C to 105°C OSCILLATOR: R2A20124AFP/ASP Oscillator frequency fosc — 200* 1 — kHz Switching frequency fsw 85 100 115 kHz Measured on OUT-A, -B Line stability fsw-line –1.5 0 1.5 % Vcc = 10 V to 16 V Temperature stability dfsw/dTa — 0.1*1 — %/°C Ta = –40°C to 105°C RT voltage VRT 2.5 2.7 2.9 V SYNC: R2A20124AFP/ASP Input threshold VTH-SYNC 2.5 2.85 3.2 V Output high VOH-SYNC 3.5 4.0 — V RSYNC = 33 k to GND *2 Output low VOL-SYNC — 0.05 0.15 V RSYNC = 33 k to VREF Minimum input pulse TI-MIN 50 — — ns Output pulse width TO-SYNC — 3.0* 1 — s REMOTE: R2A20124AFP On threshold voltage VON-REMOTE 1.12 1.32 1.52 V Off threshold voltage VOFF-REMOTE 1.04 1.23 1.42 V REMOTE hysteresis dVREMOTE 60 90 120 mV Input bias current IREMOTE –100 –50 — A REMOTE = 2 V ERROR AMPLIFIER: R2A20124AFP/ASP FB(–) input voltage VFB(–) 1.225 1.250 1.275 V FB(–) and COMP are shorted FB(–) input current IFB(–) –2.0 0 2.0 A FB(–) = 1.25 V Open-loop DC gain Av — 80* 1 — dB Unity gain bandwidth BW — 2* 1 — MHz Output source current ISOURCE –650 –500 –390 A FB(–) = 0.75 V, COMP = 2 V Output sink current ISINK 2.0 6.5 — mA FB(–) = 1.75 V, COMP = 2 V Output high voltage VOH-EO 3.7 3.9 — V FB(–) = 0.75 V, COMP; open Output low voltage VOL-EO — 0.1 0.4 V FB(–) = 1.75 V, COMP; open Output clamp voltage * 3 VCLAMP-EO –0.16 –0.07 0.0 V FB(–) = 0.75 V, COMP; open, SS = 1 V Notes: 1. Design specification (reference data) 2. R2A20124AFP: SGND and PGND 3. VCLAMP-EO = VCOMP – SS voltage (1 V) |
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