REV. A

UVLO MODE

NORMAL OPERATING MODE

TEMPERATURE – C

100m

10m

1

0

20

100

40

60

80

1m

100

10

SHUTDOWN MODE

TPC 1. Supply Current vs.

Temperature

FULL-SCALE

+0.85%

AMBIENT TEMPERATURE – C

2.010

2.000

0

20

100

40

60

80

1.990

–0.85%

+0.85%

ZERO-SCALE

–0.85%

0.9125

0.925

0.9375

TPC 4. DAC Output Voltage vs.

Temperature

IO LDO

AMBIENT TEMPERATURE – C

40

0

0

20

100

40

60

80

30

20

10

CLK LDO

TPC 7. LDO Drive Current vs.

Temperature

ADP3421–Typical Performance Characteristics

–6–

RELATIVE CORE VOLTAGE –

–0.15

–0.1

0.1

–0.05

0

0.05

HIGH

LOW

0.15

TPC 2. Power Good vs. Relative

Core Voltage Variation

AMBIENT TEMPERATURE – C

0

20

100

40

60

80

OUT = HIGH, RHYS = 17k

–100

0

OUT = HIGH, RHYS = 170k

OUT = LOW, RHYS = 170k

OUT = LOW, RHYS = 17k

100

TPC 5. Core Hysteresis Current vs.

Temperature

LOAD CURRENT – A

1.45

100

1m

0.01

1.48

1.50

1.52

1.55

0.1

1

10

EXT = 100

TPC 8. IO LDO DC Load Regulation

TIMING CAPACITANCE – nF

0.1

0.1

100

110

1

10

100

1000

CORE ZERO-SCALE

AND LDOS

CORE FULL-SCALE

TPC 3. Soft-Start Time vs. Timing

Capacitance

AMBIENT TEMPERATURE – C

0

20

100

40

60

80

–300

–200

–100

0

TPC 6. Current Limit Threshold

Current vs. Temperature

LOAD CURRENT – A

2.45

100

1m

0.01

2.50

2.55

0.1

1

EXT = 100

2.40

2.60

TPC 9. CLK LDO DC Load

Regulation