L5988DTR DC-DC Switching Converters by STMicroelectronics

4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectification

Semiconductors - ICs
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Status: Active
Series: L5988D
RoHS: Compliant
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The L5988D is a monolithic step down power switching regulator able to deliver a continuous output current of 4 A to the load in most of the application conditions limited only by the thermal performance. The device is able to deliver more than 5 A to the load for a maximum time which is dependent on the thermal impedance of the system and the specific operating conditions). The input voltage can range from 2.9 V to 18 V. The device is capable of 100% duty cycle operation thanks to the embedded high side PMOS switch which doesn’t need external bootstrap capacitor to be driven. The internal switching frequency is adjustable by external resistor and can be set continuously from 100 kHz to 1 MHz. The L5988D can also be synchronized to an external frequency signal driven to the SYNCH pin I/O pin. The multifunction UOS pin allows to set-up properly the additional embedded features depending on the value of the voltage level. U (UVLO): two UVLO thresholds can be selected to match the 3.3 V and 5 V or 12 V input buses O (OVP): latched or not latched OVP protection selectable. In latched mode the switching activity is interrupted until an UVLO or INH event happens S (SINK): the sink capability is always disabled during soft-start time to support pre-biased output voltage. Afterwards the sink capability can be enabled or not depending on the voltage set on the multifunction pin. During soft-start phase a constant current protection is active to deliver extra current necessary to load the output capacitor. The current limit protection is achieved by sensing the current flowing in both embedded switches to assure an effective protection even at extreme duty cycle operations. Finished the soft-start phase the current protection feature triggers the “HICCUP” mode forcing the soft-start capacitor to be discharged and recharged. The current thresholds of both switches can be adjusted in tracking by using an external resistor to dimension the current protection accordingly to the local application. The soft-start time is based on a constant current charge of an external capacitor. As a consequence the time can be set accordingly to the value of the output capacitor. The latest smart power technology BCD6 (Bipolar-CMOS-DMOS version 6) features a low resistance of the embedded switches (35 mΩ typical for a NMOS, 50 mΩ typical for a PMOS), achieving high efficiency levels. The HTSSOP16 package with exposed pad accomplishes low RthJA (40 °C/W), useful in dissipating power internally generated during high output current / high frequency operations.

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Prices starting from US$1.45

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Features

4 A output current (more than 5 pulsed)
Operating input voltage from 2.9 V to 18 V
External 1.8 V ± 2% reference voltage
Output voltage from 0.6 to input voltage
MLCC compatible
200 ns TON
Programmable UVLO matches 3.3 V, 5 V and 12 V bus
FSW programmable up to 1 MHz
Voltage feed forward
Zero load current operation
Programmable current limit on both switches
Programmable sink current capability
Pre-bias start up capability
Thermal shutdown

Last 6 months Inventory & Pricing History

Alternative Descriptions

Conv DC-DC Single Step Down 2.9V to 18V 16-Pin HTSSOP EP T/R | Avnet Silica
DC/DC CONV, BUCK, 1MHZ, 150DEG C | Farnell
Dc/Dc Conv, Buck, 1Mhz, 150Deg C | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a L5988DTR?

Additional datasheets, footprints and schematics for L5988DTR are listed on our Part Details page. You can also find images and similar parts to L5988DTR on this page.

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Distributor pricing and stock information is available for L5988DTR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L5988DTR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L5988DTR fall under?

The L5988DTR is listed under Power Management > DC-DC Switching Converters > Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to L5988DTR when available in the Buck Regulators range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the L5988DTR you can contact the distributor directly for product support, shipping queries etc.

Is the L5988DTR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for L5988DTR have stock available?

Authorised distributors including Avnet Silica, Farnell, Newark Electronics and EBV Elektronik have stock available or on a lead time for L5988DTR.

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