ADP5071 datasheet(9/17 Pages) AD

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Data Sheet

ADP5074

Rev. A | Page 9 of 17

VIN (V)

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

TA = +125°C

TA = +25°C

TA = –40°C

Figure 15. Operating Quiescent Current (IQ) vs. Input Voltage (VIN) for Various

Temperatures, EN Pin On

CH1

5.00V

CH2 100mV

CH4 20.0mV

CH1 1.00V

250kS/s

10k POINTS

M 4.00ms

11.92ms

VIN

VOUT

VFB

Figure 16. Line Transient Showing VIN, VOUT, and VFB, VIN = 4.5 V to 5.5 V Step,

VOUT = −5 V, RLOAD = 300 Ω, fSW = 1.2 MHz, TA = 25°C

CH3

40.0mA

CH3 10.0mA

CH4 5.00mV

CH2 50.0mV

2.50MS/s

100k POINTS

M 4.00ms

12.48ms

ILOAD

VOUT

VFB

Figure 17. Load Transient Showing ILOAD, VOUT, and VFB, VIN = 12 V,

VOUT = −5 V, ILOAD = 35 mA to 45 mA Step, fSW = 1.2 MHz, TA = 25°C

CH1

7.00V

CH2 500mV

CH3 100mA

CH1 5.00V

2.50GS/s

1M POINTS

M 4.00µs

T 29.50%

IINDUCTOR

VSW

VOUT

Figure 18. Skip Mode Operation Showing Inductor Current (IINDUCTOR), Switch

Node Voltage (VSW), and Output Ripple (VOUT), VIN = 12 V, VOUT = −5 V,

ILOAD = 1 mA, fSW = 1.2 MHz, TA = 25°C

CH1

7.00V

CH2 500mV

CH3 200mA

CH1 5.00V

2.50GS/s

1M POINTS

M 200ns

T 37.70%

IINDUCTOR

VSW

VOUT

Figure 19. Discontinuous Conduction Mode Operation Showing Inductor

Current (IINDUCTOR), Switch Node Voltage (VSW), and Output Ripple (VOUT),

VIN = 12 V, VOUT= −5 V, ILOAD = 100 mA, fSW = 1.2 MHz, TA = 25°C

CH1

7.70V

CH2 500mV

CH3 200mA

CH1 5.00V

2.50GS/s

1M POINTS

M 200ns

IINDUCTOR

VSW

VOUT

–13.0020µs

Figure 20. Continuous Conduction Mode Operation Showing Inductor

Current (IINDUCTOR), Switch Node Voltage (VSW), and Output Ripple (VOUT),

VIN = 12 V, VOUT = −5 V, ILOAD = 250 mA, fSW = 1.2 MHz, TA = 25°C

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