Document
ZXLD1615Q
AUTOMOTIVE COMPLIANT LCD BIAS GENERATOR BOOST CONVERTER
Description
The ZXLD1615Q is a PFM inductive-boost-converter designed to provide output voltages of up to 28V from a 2.5V to 5.5V input supply.
The ZXLD1615Q includes the output switch and peak current sense resistor, and can provide up to 10mA output current at maximum output voltage. Higher current is available at lower output voltages.
Quiescent current is typically 60A and a shutdown function is provided to reduce this current to less.
Nominal output voltage can be set up to a maximum of 28V by two external resistors and can be adjusted to lower values by a PWM control signal applied to the 'Enable' pin. Depending upon the control frequency, the PWM signal will provide either continuous (low ripple) or gated control. The PWM filter components are contained within the chip. Minimum output voltage is determined by the input supply.
The device is assembled in a low profile TSOT25 package.
The ZXLD1615Q is qualified to AEC-Q100 Grade 3 and is Automotive-Compliant supporting PPAPs.
Pin Assignments
LX 1 GND 2
FB 3
Applications
Automotive LCD Panels
TSOT25
5 VIN 4 EN
Features
Internal PWM Filter for Adjustable Output High Efficiency (85% typ.) Wide Input Voltage Range: 2.5V to 5.5V Up to 250mA Output Current at 5V Low 60µA Quiescent Current 100nA Maximum Shutdown Current Up to 1MHz Switching Frequency Low External Component Count Green Molding in Small Package TSOT25 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Automotive-Compliant Qualified to AEC-Q100 Grade 3 PPAP Capable (Note 4)
Notes: 1. 2.
3.
4.
No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated‟s definitions of Halogen- and Antimony-free, "Green" and Lead-free. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Automotive compliant products are AEC-Q100 qualified and are PPAP capable. Please refer to https://www.diodes.com/quality/product-compliance-
definitions/.
ZXLD1615Q
Document number: DS37687 Rev. 2 - 2
1 of 12 www.diodes.com
November 2017
© Diodes Incorporated
Typical Application Circuit
ZXLD1615Q
4.7F
Pin Description
Pin Number
1 2 3
4
5
Pin Name
LX GND FB
EN
VIN
Function
Drain of NDMOS Switch Ground (0V) Feedback Pin for Voltage Control Loop Nominal Voltage 1.025V Enable Input (Active High to Turn on Device) Also Used to Adjust Output Current by PWM Signal - Connect to VIN for Permanent Operation Input Voltage (2.5V to 5.5V) Decouple with Capacitor Close to Device
ZXLD1615Q
Document number: DS37687 Rev. 2 - 2
2 of 12 www.diodes.com
November 2017
© Diodes Incorporated
Functional Block Diagram
ZXLD1615Q
Absolute Maximum Ratings (Note 5) (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Rating
Unit
VIN
Input Voltage
-0.3 to +7
V
VLX
LX Output Voltage
-0.3 to +30
V
ILX
Switch Output Current
0.5
A
PTOT Power Dissipation (Note 6)
0.3
W
TST
Storage Temperature
-55 to +150
°C
TJ MAX Junction Temperature ESD Susceptibility
+125
°C
HBM Human Body Model
1,500
V
MM Machine Model
100
V
CDM Charged Device Model
1,000
V
Notes: 5. All voltages unless otherwise stated are measured with respect to GND. 6. Derate power dissipation above +25°C ambient temperature at +330°C/W.
Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices.
The human body model is a 100pF capacitor discharge through a 1.5kΩ resistor pin. The machine model is a 200pF capacitor discharged directly into each pin.
ZXLD1615Q
Document number: DS37687 Rev. 2 - 2
3 of 12 www.diodes.com
November 2017
© Diodes Incorporated
Recommended Operating Conditions
Symbol VIN VLX VENH VENL
fLX MAX TA
Parameter Input Voltage LX Pin (MOSFET Switch‟s Drain) Output Voltage EN Pin High Level Input Voltage EN Pin Low Level Input Voltage Recommended Maximum Operating Frequency Operating Ambient Temperature Range
ZXLD1615Q
Min
Max
Unit
2.5
5.5
V
0
28
V
1.5
VIN
V
0
0.4
V
—
1,000
kHz
-40
+85
°C
Electrical Characteristics (Test conditions: @ VIN = VEN = 3V, TA = +25°C, unless otherwise specified.)
Symbol IINQ_OFF IINQ_ON
VFB fLX tOFF tO.