MAX1901ETJ 查看數據表（PDF） - Maxim Integrated

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MAX1901ETJ

500kHz Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers

Maxim Integrated 

500kHz Multi-Output, Low-Noise Power-Supply

Controllers for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 15V, both PWMs on, SYNC = VL, VL load = 0, REF load = 0, SKIP = 0, TA = -40°C to +85°C, unless otherwise noted.) (Note 7)

PARAMETER

V+ Standby Supply Current

V+ Standby Supply Current in Dropout

V+ Shutdown Supply Current

CONDITIONS

MIN TYP MAX UNITS

V+ = 5.5V to 30V, both SMPSs off, includes

current into SHDN

60

µA

V+ = 4.2V to 5.5V, both SMPSs off, includes

current into SHDN

V+ = 4.0V to 30V, SHDN = 0

200

µA

10

µA

Quiescent Power Consumption

Both SMPSs enabled,

FB3 = FB5 = 0,

CSL3 = CSH3 = 3.5V,

CSL5 = CSH5 = 5.3V

(Note 3)

MAX1901/MAX1904

4

mW

4

FAULT DETECTION (MAX1901/MAX1902)

Overvoltage Trip Threshold

With respect to unloaded output voltage

4

Output Undervoltage Threshold

With respect to unloaded output voltage

60

10

%

80

%

Output Undervoltage Lockout Time

RESET

From each SMPS enabled, with respect to

fOSC

5,000

7,000 clks

RESET Trip Threshold

RESET Delay Time

INPUTS AND OUTPUTS

Feedback-Input Leakage Current

Logic Input-Low Voltage

With respect to unloaded output voltage,

falling edge; typical hysteresis = 1%

With respect to fOSC

FB3, FB5; SECFB = 2.6V

RUN/ON3, SKIP, TIME/ON5 (SEQ = REF),

SHDN, STEER, SYNC

-7

27,000

-4

%

clks

37,000

50

nA

0.6

V

Logic Input-High Voltage

RUN/ON3, SKIP, TIME/ON5 (SEQ = REF),

SHDN, STEER, SYNC

2.4

V

Logic Output-Low Voltage

Logic Output-High Current

RESET, ISINK = 4mA

RESET = 3.5V

0.4

V

1

mA

TIME/ON5 Input Trip Level

SEQ = 0 or VL

2.4

2.6

V

TIME/ON5 Source Current

TIME/ON5 = 0, SEQ = 0 or VL

2.5

3.5

µA

TIME/ON5 On-Resistance

TIME/ON5; RUN/ON3 = 0, SEQ = 0 or VL

80

Ω

Gate-Driver On-Resistance

High or low (Note 6)

SSOP package

QFN package

7

Ω

8

Note 1: Each of the four digital soft-start levels is tested for functionality; the steps are typically in 20mV increments.

Note 2: High duty-factor operation supports low input-to-output differential voltages, and is achieved at a lowered operating frequency

(see the Dropout Operation section).

Note 3: MAX1902 only.

Note 4: Off mode for the 12V linear regulator occurs when the SMPS that has flyback feedback (VDD) steered to it is disabled. In situa-

tions where the main outputs are being held up by external keep-alive supplies, turning off the 12OUT regulator prevents a leak-

age path from the output-referred flyback winding, through the rectifier, and into VDD.

Note 5: Since the reference uses VL as its supply, the reference’s V+ line-regulation error is insignificant.

Note 6: Production testing limitations due to package handing require relaxed maximum on-resistance specifications for the thin

QFN package. The SSOP and thin QFN package contain the same die, and the thin QFN package imposes no additional

resistance incircuit.

Note 7: Specifications from to 0°C to -40°C are guaranteed by design, not production tested.

6 _______________________________________________________________________________________

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