Slow rising input problem with ADP2504 (SR#: 1201587)

Question The ADP2504 does not seems to provide the requested voltage (5V) WHEN A SLOW RISING Input is applied (bench power supply) at power up.Looks like the adp2504 is timing out and locking at the same voltage than the input in boost mode as the VIN IS 4V and VOUT SHOULD BE 5V. Answer How slow is slow?. It looks like its seeing as under-voltage lockout here. If so, try and use the EN function once you have good supply threshold. Please ensure your Vin is < 4.3V see (PCN 11_0002 Rev. B) in the ADP2504 productline web page. Alternatively:If EN is not software controlled. Try hardwire EN pin (function) i.e. connected to Vin with a zener with resistor to act as a voltage thresholdsensing between Vin and EN will do the trick.

ADP2504 Issues with supplied current and current limiting

Question The ADP2504 not achieving the max 1 amp as defined in the spec. Answer The ADP2504 is designed to start-up with a maximum of 100uF, if you have additional capacitance besides the 22uF shown on the datasheet schematics that may result in the output voltage stuck at 80% of 5V because of the current limit.

ADP2504 Issues with supplied current and current limiting

Q The ADP2504 not achieving the max 1 amp as defined in the spec. A The ADP2504 is designed to start-up with a maximum of 100uF, if you have additional capacitance besides the 22uF shown on the datasheet schematics that may result in the output voltage stuck at 80% of 5V because of the current limit.

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ADP2504 Production
The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less...
Datasheet
ADP2504 on Analog.com

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+MAX6615AEE+: FAQ
+MAX6615AEE: FAQ
+MAX6639: FAQ
MAX6639: FAQ
+MAX6639FAEE: FAQ
+MAX6641: FAQ
+MAX6641: FAQ
+MAX6643LBBAEE+: FAQ
+MAX6650EUB+: FAQ
MAX6650EUB+: FAQ
+MAX6653AEE+: FAQ
MAX6684ESA+: FAQ
+MAX6684ESA+: FAQ
+MAX668EUB+: FAQ
+MAX668EUB_T1: FAQ
+MAX668EVKIT+: FAQ
+MAX6710KUT+: FAQ
+MAX6719AUTSVD3+T: FAQ
+MAX6722UTSDD3+: FAQ
+MAX6735A: FAQ
+MAX6735_KASYD3+_A1: FAQ
+MAX6747: FAQ
+MAX6753: FAQ
+MAX6759: FAQ
+MAX6764UT+: FAQ
MAX680CSA+: FAQ
+MAX6816: FAQ
+MAX6842DUKD0+T: FAQ
+MAX6867: FAQ
+MAX6895AALT+: FAQ
+MAX6895AAZT/V+T: FAQ
+MAX6975ATL+: FAQ
+MAX700CPA+: FAQ
+MAX705ESA+: FAQ
MAX706: FAQ
+MAX706SESA: FAQ
+MAX77324EWT00+: FAQ
+MAX77324EWTAD+: FAQ
+MAX774ESA+: FAQ
MAX77501EWV+: FAQ
+MAX77501EWV+T: FAQ
+MAX77503AEWC+T: FAQ
+MAX77503BEWC18+: FAQ
+MAX77504AAFC+T: FAQ
+MAX77542: FAQ
+MAX77597EVKIT#: FAQ
MAX775: FAQ
+MAX77643AANA+: FAQ
+MAX77655EWE+T: FAQ
+MAX77686: FAQ
+MAX77714EWC+: FAQ
+MAX77752AETL+: FAQ
+MAX77756: FAQ
+MAX77801ETP+: FAQ
+MAX77801_TP+_A1: FAQ
+MAX77812 EVALUATION KIT SOFTWARE: FAQ
+MAX77812AEWB+: FAQ
+MAX77812BEWB+: FAQ
+MAX77812CEWB+T: FAQ
MAX77812EWB+: FAQ
+MAX77812EWB+T: FAQ
+MAX77813EWP+: FAQ
+MAX77816AEWP+: FAQ
+MAX77816CEWP+T: FAQ
+MAX77827AEFD+_T1: FAQ
+MAX77827AEWC+: FAQ
+MAX77837: FAQ
+MAX77839: FAQ
+MAX77863AEWJ+: FAQ
+MAX77874: FAQ
+MAX786: FAQ
+MAX797MJE: FAQ
+MAX813LCPA: FAQ
+MAX8212CPA+: FAQ
+MAX821LUS+T: FAQ
+MAX823L: FAQ
+MAX823TEUK+: FAQ
+MAX824: FAQ
+MAX834EUK+: FAQ
+MAX8535: FAQ
+MAX8556ETE+: FAQ
+MAX8559ETAAJ+: FAQ
+MAX8569AETT+: FAQ
+MAX8570ELT+: FAQ
+MAX8570EUT+: FAQ
+MAX8597ETP+: FAQ
+MAX8607ETD+: FAQ
+MAX860MSA/PR2+_T1: FAQ
+MAX8625AETD+: FAQ
+MAX8647ETE+: FAQ
+MAX8664: FAQ
+MAX8668: FAQ
+MAX8686ETL+: FAQ
+MAX8794ETB+: FAQ
+MAX8815AETB+T: FAQ
+MAX8840ELT18+: FAQ
+MAX8858ETJ+: FAQ
+MAX8869EUE18+: FAQ
+MAX8881: FAQ
+MAX8887EZK18+T: FAQ
+MAX8892: FAQ
+MAX889RESA+: FAQ
+MAX8902AATA+: FAQ
+MAX8902AATA/V+: FAQ
+MAX8902B: FAQ
MAX8969AEWL53+: FAQ
+MAX8969AEWL53+T: FAQ
+MAXM15064AMB+T: FAQ
+MAXM15462AMB+: FAQ
+MAXM17502EVKIT#: FAQ
+MAXM17503ALJ+: FAQ
+MAXM17504EVKITAE#: FAQ
+MAXM17505: FAQ
+MAXM17515: FAQ
MAXM17532: FAQ
+MAXM17532AMB+T: FAQ
MAXM17537ALY#: FAQ
+MAXM17537ALY#T: FAQ
+MAXM17544ALJ+: FAQ
+MAXM17544EVKIT#: FAQ
MAXM17545: FAQ
+MAXM17545ALJ+T: FAQ
+MAXM17552: FAQ
+MAXM17575ALI#T: FAQ
+MAXM17575EVKIT#: FAQ
+MAXM17623AMB+T: FAQ
+MAXM17624AMB+: FAQ
+MAXM17635AMG+: FAQ
+MAXM17761ALI+: FAQ
+Measuring Signals: FAQ
+Package Information: FAQ
+Photosensitive: FAQ
+Power Management Support Intro: FAQ
+Switching Power: FAQ
+Temperature Grade: FAQ
+uPMU: FAQ
+VT1697SBFQX: FAQ
What is the maximum current the flag pin on the MAX17613A can sink?
When using two LTC4359 controllers with different input voltages, why does the high-side MOSFET turn off during source transition?
Where can I get the LTC9101-3 software interface datasheet?
Where can I get the LTM2987BY datasheet from?
Why does the MAX5995B on the MAXREFDES1266 consume 13mA even at light loads?

ADP2504: FAQ

Q: ADP2504 Issues with supplied current and current limiting

Question The ADP2504 not achieving the max 1 amp as defined in the spec. Answer The ADP2504 is designed to start-up with a maximum of 100uF, if you have additional capacitance besides the 22uF shown on the datasheet schematics that may result in the output voltage stuck at 80% of 5V because of the current limit.

Q: ADP2504 Issues with supplied current and current limiting

Q The ADP2504 not achieving the max 1 amp as defined in the spec. A The ADP2504 is designed to start-up with a maximum of 100uF, if you have additional capacitance besides the 22uF shown on the datasheet schematics that may result in the output voltage stuck at 80% of 5V because of the current limit.