ZXLD1370

Document number: DS32165 Rev. 6 - 2

6 of 40

www.diodes.com

December 2016

© Diodes Incorporated

ZXLD1370

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Supply and Reference Parameters

Undervoltage Detection Threshold

Normal Operation to Switch Disabled

5.2

5.6

6.3

V

Undervoltage Detection Threshold

Switch Disabled to Normal Operation

5.5

6.0

6.5

V

PWM Pin Floating

Output Not Switching

—

1.5

3.0

mA

—

150

300

µA

PWM Pin Grounded

for more than 15ms

—

90

150

µA

—

0.7

10.0

µA

Internal Reference Voltage

No Load

1.237

1.250

1.263

V

Change in Reference Voltage with Output

Current

Sourcing 1mA

-5

—

—

mV

Sinking 100µA

—

—

5

Reference Voltage Line Regulation

-60

-90

—

dB

Reference Temperature Coefficient

—

—

+/-50

—

ppm/°C

DC-DC Converter Parameters

External DC control voltage applied to ADJ pin

to adjust output current (Note 8)

DC Brightness Control Mode

10% to 200%

0.125

1.25

2.50

V

ADJ Input Current (Note 10)

≤ 2.5V

†

—

—

100

5

nA

µA

GI Voltage threshold for boost and buck-boost

modes selection (Note 8)

—

—

0.8

V

GI Input Current (Note 10)

≤ 2.5V

†

—

—

100

5

nA

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

Current Measurement Sense Voltage

Buck

—

218

—

mV

Boost (Note 11)

—

225

—

Buck-Boost (Note 11)

—

—

—

—

±0.25

±2

%

Overcurrent Sense Threshold Voltage

300

350

375

mV

Notes:

10. 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.

11. Initial sense voltage in Boost and Buck-Boost modes at maximum duty cycle.