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WM8321 Folha de dados(PDF) 17 Page - Wolfson Microelectronics plc |
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WM8321 Folha de dados(HTML) 17 Page - Wolfson Microelectronics plc |
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17 / 253 page  Production Data WM8321 w PD, February 2012, Rev 4.0 17 DC-DC3 and DC-DC4 Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, MODE = FCCM (1), TJ = -40°C to +125°C; typical values are at TJ = 25°C PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage VIN 2.7 5.5 V Programmable Output Voltage VOUT 0.85 (4) 3.4 V VOUT Step Size VOUT_STEP 25 mV VOUT Accuracy VOUT_ACC VIN = 2.7V to 5.5V, IOUT = 0mA to 1000mA -4 +4 % Undervoltage margin VUV 0.85V ≤ VOUT ≤ 3.4V 50 mV Output Current IOUT FCCM (1) and Auto (CCM/DCM with PS (2)) Modes Independent operation (DC4_SLV=0) 0 1000 mA Dual mode operation (DC4_SLV=1) 0 800 (5) Hysteretic Mode, DCm_STNBY_LIM=01 0 100 (3) LDO Mode 0 10 P-channel Current Limit IP_LIM 1600 mA Quiescent Current IQ IOUT = 0mA, FCCM (1) and Auto (CCM/DCM with PS (2)) Modes (excluding switching losses) 330 A IOUT = 0mA, Hysteretic Mode 110 IOUT = 0mA, LDO Mode 20 Shutdown Current ISD DCm_ENA = 0 0.01 A P-channel On Resistance RDSP VIN = VGS = 3.8V, IDCmLX = 100mA 165 m N-channel On Resistance RDSN VIN = VGS = 3.8V, IDCmLX = -100mA 155 m Switching Frequency FSW 2 MHz Notes: 1. Forced Continuous Conduction Mode 2. Continuous / Discontinuous Conduction with Pulse-Skipping Mode 3. The maximum output current in Hysteretic mode can be adjusted using the DCm_STNBY_LIM registers 4. In FCCM mode, the minimum VOUT is 1.2V 5. In Dual mode operation, the ratings are ‘per converter’. The combined maximum output current is 1600mA 7.2 LDO REGULATORS LDO1 Unless otherwise noted: VIN = 3.8V, VOUT = 1.8V, TJ = -40°C to +125°C; Typical values are at TJ = +25ºC PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage VIN 1.5 5.5 V Programmable Output Voltage VOUT 0.9 3.3 V VOUT Step Size VOUT_STEP VOUT = 0.9V to 1.6V 50 mV VOUT = 1.7V to 3.3V 100 Output Current IOUT Normal mode 0 300 mA Low power mode, LDOn_LP_MODE=0 0 50 Low power mode, LDOn_LP_MODE=1 0 20 VOUT Accuracy VOUT_ACC ILOAD = 1mA -3 +3 % |
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