Datasheet ADP2302, ADP2303 (Analog Devices) - 9

Data Sheet ADP2302/ADP2303 270 150 265 145 260 140 255 s) n 250 s) 135 ( (n 245 IME 130 IME T F 240 T F N 125 O 235 M M O 230 120 IMU IMU N 225 N 115 MI MI 220 110 215 105 210 205 100 –40 –20 0 20 40 60 80 100 120
5 022
–40 –20 0 20 40 60 80 100 120
02 33-
TEMPERATURE (°C)
33- 88
TEMPERATURE (°C)
0 088 Figure 22. Minimum Off Time vs. Temperature Figure 25. Minimum On Time vs. Temperature
180 VOUT (AC) 170 1 160 ) 150 Ω m ( 140 I R L O 130 T S 120 ESI R SW T 110 E 4 SF 100 VGS = 3V MO 90 VGS = 4V V 80 GS = 5V 2 70 60–40 –20 0 20 40 60 80 100 120
23
CH1 5.00mV B M1.00µs A CH2 7.50V
026 0
W CH2 5.00V
3-
TEMPERATURE (°C) CH4 2.00A Ω T 30.00%
83 08833- 08 Figure 23. MOSFET RDSON vs. Temperature (Pin-to-Pin Measurement) Figure 26. Continuous Conduction Mode (CCM), VOUT = 3.3 V, VIN = 12 V
VOUT (AC) 1 VOUT (AC) I 1 L 4 IL 4 SW SW 2 2
24
CH1 5.00mV B
0
W CH2 5.00V M1.00µs A CH2 7.50V CH1 50.00mV BW CH2 5.00V M200µs A CH2 7.50V
-027
CH4 2.00A Ω
33-
T 30.00% T 30.00%
088
CH4 2.00A Ω
8833 0 Figure 24. Discontinuous Conduction Mode (DCM), VOUT = 3.3 V, VIN = 12 V Figure 27. Power Saving Mode, VOUT = 3.3 V, VIN = 12 V Rev. A | Page 9 of 28 Document Outline Features Applications Typical Applications Circuit General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Functional Block Diagram Theory of Operation Basic Operation PWM Mode Power Saving Mode Bootstrap Circuitry Precision Enable Integrated Soft Start Current Limit Short-Circuit Protection Undervoltage Lockout (UVLO) Thermal Shutdown (TSD) Overvoltage Protection (OVP) Power Good Control Loop Applications Information ADIsimPower Design Tool Programming Output Voltage Voltage Conversion Limitations Low Input Voltage Considerations Programming the Precision Enable Inductor Catch Diode Input Capacitor Output Capacitor Thermal Consideration Design Example Catch Diode Selection Inductor Selection Output Capacitor Selection Resistive Voltage Divider Selection Circuit Board Layout Recommendations Typical Application Circuits Outline Dimensions Ordering Guide