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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS3658 датащи(PDF) 83 Page - ams AG |
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AS3658 датащи(HTML) 83 Page - ams AG |
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83 / 158 page  www.austriamicrosystems.com Revision 1v13 82 - 157 AS3658 Data Sheet Confidential - Detail ed Descri ption-Power Management Functions 8.12.2 Digital LDO’s (VDIG_1, VDIG_2, VDIG_3, VDIG_4) The Digital LDO’s can be used in any medium power system or subsystem where quiescent power consumption of the regulator itself has to be minimized without sacrificing its performance. For its stability a cheap 1µF ceramic capacitor is required. The 5V charge pump will be switched on automatically, if one of the digital LDO’s are switched on. Figure 33. Digital LDO Block diagram VLoadReg Load regulation -1 1 mV Static -10 10 Transient; Slope: tr=10µs ILIMIT_VRF1_HCUR R Current limitation 800 mA VRF_1, rf1_lcurr_en=0 ILIMIT_VRF1_LCURR Current limitation 400 mA VRF_1, rf1_lcurr_en=1 and during startup ILIMIT_VRF2,3_L Current limitation VRF_2,3 low current limit 300 mA rf2_lcurr_en=1, rf3_lcurr_en=1 ILIMIT_VRF2,3_H Current limitation VRF_2,3 high current limit 500 mA rf2_lcurr_en=0, rf3_lcurr_en=0 CLOAD_RF1 Load capacitor 2 5 µF ceramic only (VRF_1) CLOAD_RF2,3_L Load capacitor 1 5 µF ceramic only (VRF_2,3) for rf1_lcurr_en=1 and rf2_lcurr_en=1 CLOAD_RF2,3_H Load capacitor 2 5 µF ceramic only (VRF_2,3) for rf1_lcurr_en=0 and rf2_lcurr_en=0 1. Guaranteed by design and verified by laboratory evaluation and characterization; not production tested. Table 81. Digital LDO (VDIG1, VDIG2, VDIG3, VDIG4) Characteristics,VSUPPLY=4V; ILOAD=200mA; Tamb=25ºC; CLOAD =1µF (Ceramic); unless otherwise specified Symbol Parameter Min Typ Max Unit Note VDIGX_IN Supply voltage range 1 5.5 V IOUT Output current 1 0200 mA Vout<2.2V; VDIGX_IN>Vout+RON*IOUT 0100 mA Vout<2.5V; VDIGX_IN>Vout+RON*IOUT RON On resistance 4 Ω Vout<2.2V Table 80. Analog LDO (VRF_1, VRF_2, VRF_3) Characteristics, Vx_IN=4V; ILOAD=150mA; Tamb=25ºC; CLOAD =2.2µF (Ceramic); unless otherwise specified Symbol Parameter Min Typ Max Unit Note μ |
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