8.2.3 Application Curves

Measurements are done using typical application set up with connections shown in Figure 19. Graphs may not reflect the OTP default settings. Unless otherwise specified: V_IN = 3.7 V, V_(NRST) = 1.8 V, T_A = 25 °C, ƒ_SW = 3 MHz, L = 470 nH (TDK VLS252010HBX-R47M), I_{LIM FWD} set to maximum 5 A.

VIN = 3.7 V
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 20. Efficiency vs Load Current

Load = 1A
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 22. Efficiency vs Input Voltage in PWM Mode

Change in Output Voltage from Zero Load (%)
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 24. DC Load Regulation in PWM mode

VOUT setting = 2500 mV

Figure 26. Output Voltage vs Load Current in
PWM-PFM Mode

VOUT setting = 1000 mV
Load = 1 A (PWM Mode) and 100 mA (PFM Mode)

Figure 28. Output Voltage vs Temperature

Load = 1 A

Figure 30. Start-up with EN1

Load = 0 A	Enable and disable delays = default
VOUT settings = default

Figure 32. V_OUT0,1,2,3: Start-up and Shutdown with Default Register Settings, triggered by EN1.

Load = 10 mA

Figure 34. Output Voltage Ripple, PFM Mode

Figure 36. Transient from PFM-to-PWM Mode

Load = 4 A		VOUT = 1000 mV
VIN stepping 3.3 V ↔ 3.8 V, TR = TF = 10 µs

Figure 38. Transient Line Response

Load = 0 A → 2 A → 0 A	TR = TF = 400 ns	VOUT = 1 V

Figure 40. Transient Load Step Response,
Forced PWM Mode

Figure 42. V_OUT Transition From 0.6 V to 1.4 V With Different Slew Rate Settings

Load = 100 mA
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 21. Efficiency vs Input Voltage in PFM Mode

Load = 3A
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 23. Efficiency vs Input Voltage in PWM Mode

VOUT setting = 1000 mV

Figure 25. Output Voltage vs Load Current in
PWM-PFM Mode

Change in Output Voltage from VIN = 3.7 V (%)		Load = 1 A
VOUT settings = 1000 mV, 1200 mV, 1800 mV, and 2500 mV

Figure 27. DC Line Regulation in PWM Mode

Load = 0 A

Figure 29. Start-up with EN1

Figure 31. Start-up With Short on Output

Load = 0 A

Figure 33. Shutdown with EN1

Load = 200 mA

Figure 35. Output Voltage Ripple, Forced PWM Mode

Figure 37. Transient from PWM-to-PFM Mode

Load = 0 A → 2 A → 0 A	TR = TF = 400 ns	VOUT = 1 V

Figure 39. Transient Load Step Response, AUTO Mode

Load = 1A → 4 A → 1A	TR = TF = 1 µs	VOUT = 1 V

Figure 41. Transient Load Step Response,
Forced PWM Mode

Figure 43. V_OUT Transition From 1.4 V to 0.6 V With Different Slew Rate Settings