5

FN9171.1

Typical Operating Performance

Test results from the Intersil ISL6271A Customer Reference Board (CRB). Output filter on switcher made up of a 4.7µH drumcore with 100m

Ω of

DCR and an output capacitance of 10µF. X5R; Rcomp = 50k

Ω, Vin = 3.6V unless otherwise noted.

FIGURE 3. EFFICIENCY (Vin = 3.6V)

FIGURE 4. VSRAM LINE-LOAD REGULATION

FIGURE 5. SWITCHING REGULATOR EFFICIENCY

50mA to 260mA load step on VOUT.

Top: Output voltage, 50mV/DIV; Phase node, 5V/DIV.;

Inductor current, 200mA/DIV, 2µs/DIV

FIGURE 6. DCM TO CCM

Top: phase node output voltage ripple, 10mV/DIV.

Bottom: Inductor current, 100mA/DIV, 1µs/DIV

FIGURE 7. CCM TO CCM

60%

65%

70%

75%

80%

85%

90%

95%

100%

0

200

400

600

800

Io (mA)

Vo=1.6V

Vo=1.3V

1.085

1.086

1.087

1.088

1.089

1.09

1.091

1.092

1.093

1.094

1.7

2.5

3.5

INPUT VOLTAGE

Iout = 85mA

Io = 10mA

Io = 25mA

Iout = 55mA

1.301

1.302

1.303

1.304

1.305

1.306

1.307

1.308

1.309

1.7

2.5

3.5

INPUT VOLTAGE

Iout = 65mA

Io = 5mA

Io = 20mA

Iout = 55mA

VOUT

IOUT

PHASE

ISL6271A