MAX1802 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1802

Digital Camera Step-Down Power Supply

Maxim Integrated 

Digital Camera Step-Down

Power Supply

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, VVDDM = 6V, VVDDC = 3V, PGNDM = PGND = GND, DCON1 = REF, VONM = 3V, VONC = VON1 = VDCON2 =

VDCON3 = 0, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

FBC Input Leakage Current

COMPC Minimum Output

Voltage

SYMBOL

CONDITIONS

VFBC = 1.35V

VFBC = 1.35V, COMPC open

MIN TYP MAX UNITS

100

nA

0.3

V

COMPC Maximum Output

Voltage

VCOMPC(MAX) VFBC = 1.15V, COMPC open

2.00

2.27

V

CORE POWER SWITCHES (VONC = 3V)

LXC Leakage Current

Switch On-Resistance

RDSN

RDSP

N-Channel Turn-Off Current

VLXC = 0, 5.5V

N-channel, ILXC = 0.75A

P-channel, ILXC = 0.75A

AUXILIARY DC-DC CONTROLLERS 1, 2, 3 (VON1 = VDCON_= 3V)

INTERNAL CLOCK

OSC Clock Low Trip Level

OSC falling edge

OSC Clock High Trip Level

VDCON_ = 0.625V

VDCON_ = 1.25V to VVL

Maximum Duty Cycle

Adjustment Range

DCON_ Input Leakage Current

VDCON_ = 0V to 3V

DCON_ Input Sleep-Mode

Threshold

VDCON_ rising, 50mV hysteresis

5

0.2

0.575

1.00

40

0.35

20

µA

350

mΩ

400

190

mA

0.3

V

0.675

V

1.10

90

%

1

µA

0.45

V

AUXILIARY ERROR AMPLIFIER

FB_ Regulation Voltage

Unity gain configuration, FB_ = COMP_

1.230

1.265

V

FB_ to COMP_

Transconductance

GEA

Unity gain configuration, FB_ = COMP_,

-5µA < ILOAD < 5µA

70

FB_ Input Leakage Current

AUXILIARY DRIVERS (DL1, DL2, DL3)

VFB_ = 1.35V

DL_ Driver Resistance

Output high or low

Note 1: Specifications to -40°C are guaranteed by design and not production tested.

160

µs

100

nA

11

Ω

8 _______________________________________________________________________________________

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