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ADP2450ASTZ-5-R7 数据表(PDF) 6 Page - Analog Devices |
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ADP2450ASTZ-5-R7 数据表(HTML) 6 Page - Analog Devices |
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6 / 40 page  ADP2450 Data Sheet Rev. B | Page 6 of 40 BUCK REGULATOR SPECIFICATIONS VIN = 12 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted. Table 2. Parameter Symbol Test Conditions/Comments Min Typ Max Unit POWER INPUT VIN pin Undervoltage Lockout Threshold1 VIN Rising 4.2 4.4 V VIN Falling 3.5 3.65 V FEEDBACK (FB2) FB2 Regulation Voltage VFB2 Adjustable output version 0.591 0.6 0.609 V Fixed Output Accuracy Fixed output version −1.5 +1.5 % FB2 Bias Current IFB2 Adjustable output version 0.01 0.1 μA Fixed output version 4.3 5 μA SWITCH NODE High-Side On Resistance (LFCSP)2 RDSON_H_LFCSP ISW_SOURCE = 0.5 A 700 1070 mΩ Low-Side On Resistance (LFCSP)2 RDSON_L_LFCSP ISW_SINK = 0.5 A 380 540 mΩ High-Side On Resistance (LQFP)2 RDSON_H_LQFP 750 1210 mΩ Low-Side On Resistance (LQFP)2 RDSON_L_LQFP 430 620 mΩ SW Leakage Current ISW_LK_HS SW = PGND2 0.1 μA ISW_LK_LS SW = VIN 42 μA Minimum On Time tON_MIN 42 ns Minimum Off Time tOFF_MIN 150 ns BST Bootstrap Voltage VBOOT 4.7 5 5.3 V CURRENT LIMIT Valley Current Limit 0.65 0.8 0.98 A Low-Side Sink Current Limit 0.2 A PWM SWITCHING FREQUENCY fSW 1.0 1.2 1.4 MHz SOFT START TIME tSS Fixed output version 400 μs Adjustable output version 1.6 ms RESET (RSTO) Reset Rising Threshold Voltage Refer to VFB2 85 89 94 % Reset Threshold Hysteresis 1 % Reset Rising Delay tRST_DELAY_R Option 1, default 0.42 0.5 0.56 ms Option 2 0.85 1 1.12 ms Option 3 1.72 2 2.3 ms Option 4 4.2 5 5.6 ms Reset Falling Delay tRST_DELAY_F 10 μs RSTO Output Low Voltage IRSTO = 3 mA 40 100 mV RSTO Leakage Current VRSTO = 5 V 0.01 0.3 μA 1 This UVLO threshold is only for the buck control block. 2 Pin to pin measurement. PROGRAMMABLE GAIN AMPLIFIER AND ANALOG TRIP SPECIFICATIONS VIN = 12 V, VAVDD = 5 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted. Table 3. Parameter Symbol Test Conditions/Comments Min Typ Max Unit POWER INPUT AVDD pin Input Voltage Range VAVDD 2.7 5.5 V Quiescent Current IQ_AVDD 575 μA Undervoltage Lockout Threshold |
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