MAX5005_CUB 查看數據表（PDF） - Maxim Integrated

零件编号

产品描述 (功能)

比赛名单

MAX5005_CUB

150mA USB LDO Regulators with ±15kV TVS and µP Reset

Maxim Integrated 

150mA USB LDO Regulators with ±15kV TVS

and µP Reset

Note that some ceramic dielectrics exhibit large capac-

itance and ESR variation with temperature. With

dielectrics such as Z5U and Y5V, it may be necessary

to use 2.2µF or more to ensure stability at temperatures

below -10°C. With X7R or X5R dielectrics, 1µF should

be sufficient at all operating temperatures. Also, for

high-ESR tantalum capacitors, 2.2µF or more may be

needed to maintain stability. A graph of the Region of

Stable COUT ESR vs. Load Current is shown in the

Typical Operating Characteristics.

To improve power-supply rejection and transient

response use a 1µF capacitor between IN and GND.

Negative-Going VOUT Transients

These devices are relatively immune to short-duration,

negative-going VOUT transients. The Typical Operating

Characteristics section shows a graph of the Maximum

Pulse Duration vs. Reset Threshold Overdrive for which

reset is not asserted. The graph was produced using

negative going output transients starting at VOUT and

ending below the reset threshold by the magnitude

indicated (Reset Threshold Overdrive). The graph

shows the maximum pulse width that a negative going

VOUT transient can typically have without triggering a

reset pulse. As the amplitude of the transient increases

(i.e., goes further below the reset threshold), the maxi-

mum allowable pulse width decreases. Typically, a

VOUT transient that goes only 10mV below the reset

threshold and lasts for 75µs will not trigger a reset

pulse.

USB ±15kV Transient Voltage

Suppression

The universal serial bus (USB) simplifies interconnectiv-

ity between peripheral devices and personal comput-

ers. USBs offer high-speed data communication rates

(up to 12Mbps) using only two lines (D+ and D-).

CMOS based USB peripherals that utilize deep submi-

cron technologies are more susceptible to electrostatic

discharge (ESD) failure due to shorter channel lengths,

shallower drain/source junctions, and lightly doped

drain structures. The MAX5005/MAX5006/MAX5007

incorporate a proprietary transient voltage suppression

(TVS) circuit for use with submicron devices.

The TVS design complies with IEC-1000-4-2 level 4

(EN61000-4-2) ±15kV Air Discharge and ±8kV Contact

Discharge as well as MIL STD 883C-Method 3015-6

level 3.

The TVS circuit handles up to 11A of surge current. The

TVS/ESD structure is directly coupled to the output of

the LDO regulator.

TVS Surge Test Information

Figure 2 shows the test circuit used to generate the

8/40µs short circuit waveform of Figure 3. Figures 4, 5,

and 6 show the actual surge current I/V characteristics

with various capacitive loads.

ESD Performance

The MAX5005/MAX5006/MAX5007 are characterized

to the following limits on D+, D-, and IN:

• ±15kV using the Human Body Model

• ±8kV using the Contact Discharge Method specified

in IEC 1000-4-2 (EN61000-4-2)

• ±15kV using the Air-Gap Discharge Method speci-

fied in IEC 1000-4-2 (EN61000-4-2).

Note that in order to achieve the above ESD levels on

IN, a ceramic 1µF ceramic capacitor should be con-

nected from IN to GND.

ESD Test Conditions

ESD performance depends on several conditions.

Contact Maxim for a reliability report that documents

test setup, methodology, and results.

Human Body Model

Figure 7 shows the Human Body Model, and Figure 8

shows the current waveform it generates when dis-

charged into low impedance. This model consists of a

100pF capacitor charged to the ESD voltage of interest,

which is then discharged into the test device through a

1.5kΩ resistor.

ESD Transmission Line Pulsing

Figure 9 shows the test circuit used for transmission

line pulsing conditions. The 200ns pulsewidth has a

rise time of 4ns. Figure 10 shows the Current vs.

Voltage characteristics for various output capacitance

values.

_______________________________________________________________________________________ 9

Share Link: