40V, Ultra-Low Quiescent-Current

Linear Regulators in 6-Pin TDFN/8-Pin SO

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Detailed Description

The MAX15006/MAX15007 high-voltage linear regula-

tors operate over a 4V to 40V input voltage range.

These devices guarantee 50mA load drive, and offer

preset output voltages of +3.3V or +5V. Thermal shut-

down and short-circuit protection prevent damage dur-

ing overtemperature and overcurrent conditions. The

MAX15007 includes an enable input (EN) allowing the

regulators to be turned on/off using a logic-level volt-

age. Driving EN high turns on the device while driving

EN low places the device in a low-power shutdown

mode. In shutdown, the supply current is reduced to

3µA (typ). The MAX15006/MAX15007 operate over the

-40°C to +125°C automotive temperature range. All

devices are available in thermally enhanced 6-pin

TDFN and 8-pin SO packages capable of dissipating

Regulator

The regulator accepts an input voltage from 4V to 40V.

The MAX15006A/MAX15007A have a fixed 3.3V output

voltage while the MAX15006B/MAX15007B offer a fixed

5V output voltage.

EN Input (MAX15007 Only)

EN is an active-high, logic-level enable input that turns

the device on or off. Drive EN high to turn the device

on. An internal 0.5µA pulldown current keeps the

MAX15007 in shutdown mode when driven by a three-

state driver in high-impedance mode, or an open-drain

driver. While in shutdown, the device consumes only

3µA (typ). EN withstands voltages up to 40V, allowing it

to be driven by high input level voltages or connected

to IN for always-on operation.

Thermal Protection

When the junction temperature exceeds +165°C, an

internal thermal sensor turns the pass transistor off, and

allows the device to cool. The thermal sensor turns the

pass transistor on again after the junction temperature

cools by 20°C. This results in a cycled output during

continuous thermal-overload conditions. Thermal pro-

tection protects the MAX15006/MAX15007 in the event

going into thermal shutdown is not guaranteed. Use

Figures 3a and 3b to determine the minimum guaran-

teed output current.

Output Short-Circuit Current Limit

The MAX15006/MAX15007 feature a 175mA current

limit. The output can be shorted to GND for an indefi-

nite period of time without damage to the device.

During a short circuit, the power dissipated across the

pass transistor can quickly heat the device. When the

die temperature reaches +165°C, the MAX15006/

MAX15007 shut down and automatically restart after

the die temperature cools by 20°C.

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AMBIENT TEMPERATURE (

°C)

125

120

110 115

90 95 100 105

85

5

10

15

20

25

30

35

40

45

50

55

0

80

130

Figure 3a. Minimum Output Current vs. Ambient Temperature

(6-Pin TDFN-EP)

AMBIENT TEMPERATURE (

°C)

125

120

110 115

90 95 100 105

85

5

10

15

20

25

30

35

40

45

50

55

0

80

130

Figure 3b. Minimum Output Current vs. Ambient Temperature

(8-Pin SO-EP)