ZXLD1371Q

ZXLD1371Q

Document number: DS37116 Rev. 1 - 2

5 of 42

www.diodes.com

September 2015

© Diodes Incorporated

ZXLD1371Q

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Supply and Reference Parameters

Undervoltage Detection Threshold

Normal Ooperation to Switch Disabled

—

4.5

—

V

Undervoltage Detection Threshold

Switch Disabled to Normal Operation

—

4.9

—

V

PWM pin floating

Output not switching

—

1.5

3

mA

—

150

300

µA

PWM pin grounded

for more than 15ms

—

90

150

µA

—

0.7

10

µA

Internal Reference Voltage

No load

1.237

1.25

1.263

V

Change in Reference Voltage with Output Current

Sourcing 1mA

-5

—

—

mV

Sinking 25µA

—

—

5

-60

-90

—

dB

Reference Temperature Coefficient

—

—

±50

—

ppm/°C

DC-DC Converter Parameters

ADJ Input Current (Note 12)

≤ 1.25V

—

—

100

nA

—

—

5

µA

GI Voltage threshold for Boost and Buck-Boost

Modes Selection (Note 12)

—

—

0.8

V

GI Input Current (Note 12)

≤ 1.25V

—

—

100

nA

—

—

5

µA

PWM Input Current

—

36

100

µA

PWM Pulse Width

(to enter shutdown state)

PWM input low

10

15

25

ms

Thermal Shutdown Upper Threshold

(GATE output forced low)

Temperature rising

—

+150

—

°C

Thermal Shutdown Lower Threshold

(GATE output re-enabled)

Temperature falling

—

+125

—

°C

High-Side Current Monitor (Pin ISM)

Input Current

—

11

20

µA

—

±0.25

±2

%

300

350

375

mV

Notes:

11. UVLO levels are such that all ZXLD1371Q will function above 5.4V for rising supply voltages and function down to 5V for falling supply voltages.

12. The ADJ and GI pins have an internal clamp that limits the internal node to less than 3V. This provides some failsafe should those pins get

overdriven.