LMZ36002RKGT

Synchronous Buck Converter

The LMZ36002RKGT is a synchronous buck converter from Texas Instruments. View the full LMZ36002RKGT datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
Output Current	2A
Package Dimensions	10mm x 10mm x 4.3mm
Input Voltage Range	4.5V to 60V
Switching Frequency	200kHz to 1MHz
Output Voltage Range	2.5V to 7.5V
Overcurrent Threshold	2.5A
Operating Temperature Range	-40°C to 105°C
Thermal Shutdown Temperature	160°C
Junction-To-Ambient Thermal Resistance	14°C/W

Overview

Part: LMZ36002 — Texas Instruments

Type: Power Module

Description: The LMZ36002 is a 4.5-V to 60-V input, 2-A power module that combines a DC/DC converter with a shielded inductor and passives into a low profile, 10 mm × 10 mm × 4.3 mm QFN package.

Operating Conditions:

Supply voltage: 4.5 V to 60 V
Operating temperature: -40°C to 105°C
Output voltage adjust: 2.5 V to 7.5 V
Adjustable switching frequency: 200 kHz to 1 MHz

Absolute Maximum Ratings:

Max supply voltage (PVIN, INH/UVLO): 65 V
Max output voltage (VOUT, SENSE+, VBSEL): 30 V
Max junction temperature: 125 °C
Max storage temperature: 150 °C

Key Specs:

Output current: 2 A
Package dimensions: 10 mm × 10 mm × 4.3 mm
Enhanced thermal performance: 14°C/W
ESD HBM rating: ±1000 V
ESD CDM rating: ±1000 V
Peak Reflow Case Temperature: 245 °C
Maximum number of reflows allowed: 3

Features:

Complete Integrated Power Solution Allows Small Footprint, Low-Profile Design
Wide-Output Voltage Adjust (2.5 V to 7.5 V)
Adjustable Switching Frequency (200 kHz to 1 MHz)
Synchronizes to an External Clock
Automatic PFM Mode for Light Load Efficiency
Adjustable Soft-Start Time
Output Voltage Sequencing / Tracking
Power-Good Output
Programmable Undervoltage Lockout (UVLO)
Overtemperature Thermal Shutdown Protection
Overcurrent Protection (Hiccup Mode)
Prebias Output Start-Up
Meets EN55022 Class B Emissions - Integrated Shielded Inductor

Applications:

Industrial and Motor Controls
Automated Test Equipment
Medical and Imaging Equipment
High Density Power Systems

Package:

QFN (43) - 10.0 mm × 10.00 mm

Features

1 · Complete Integrated Power Solution Allows Small Footprint, Low-Profile Design
10 mm × 10 mm × 4.3 mm Package
Wide-Output Voltage Adjust (2.5 V to 7.5 V)
Adjustable Switching Frequency (200 kHz to 1 MHz)
Synchronizes to an External Clock
Automatic PFM Mode for Light Load Efficiency
Adjustable Soft-Start Time
Output Voltage Sequencing / Tracking
Power-Good Output
Programmable Undervoltage Lockout (UVLO)
Overtemperature Thermal Shutdown Protection
Overcurrent Protection (Hiccup Mode)
Prebias Output Start-Up
Operating Temperature Range: -40°C to 105°C
Enhanced Thermal Performance: 14°C/W
Meets EN55022 Class B Emissions - Integrated Shielded Inductor
Create a Custom Design using the LMZ36002 with the WEBENCH® Power Designer

Applications

Industrial and Motor Controls
Automated Test Equipment
Medical and Imaging Equipment
High Density Power Systems

Pin Configuration

Pin Functions

Pin Functions

PIN	PIN	TYPE (1)	DESCRIPTION
NAME	NO.	TYPE (1)	DESCRIPTION
AGND	1, 2, 3, 4, 5, 11, 12	G	Zero volt reference for the analog control circuitry. All of these pins are not connected together internal to the device and must be connected to one another externally using an analog ground plane on the PCB. Pins 11 and 12 are internally connected to the PGND of the device at a single point. The analog ground plane of the PCB should allow only analog ground currents to flow through these pins.
CLK	8	I	Synchronization input to synchronize the device to an external clock. Connect this pin to AGND if not used.
DNC	6, 40	-	Do Not Connect. Do not connect these pins to AGND, to another DNC pin, or to any other voltage. These pins are connected to internal circuitry. Each pin must be soldered to an isolated pad.
INH/UVLO	26	I	Inhibit and UVLO adjust pin. Use an open drain or open collector device to control the inhibit function. A resistor divider between this pin, AGND, and PVIN adjusts the UVLO voltage. Connect this pin to PVIN if not used.
PGND	19, 29, 30, 31, 32, 33, 41	G	This is the return current path for the power stage of the device. Connect these pins to the input source, the load, and to the bypass capacitors associated with PVIN and VOUT using power ground planes on the PCB. Pad 41 should be connected to the ground planes using multiple vias for good thermal performance.
PH	34, 35, 36, 37, 38, 39	O	Phase switch node. Do not place any external components on these pins or tie them to a pin of another function.
PVIN	27, 28, 42	I	Power input voltage. These pins supply all of the power to the device. Connect these pins to the input source and connect external bypass capacitors between these pins and PGND close to the device.
PWRGD	20	O	Power Good flag pin. This open drain output asserts low if the output voltage is more than approximately ±10% out of regulation. This pin is internally connected to an uncommitted 100-k Ω pull-up resistor that can be pulled up to a user-defined voltage applied to the PWRGD_PU pin.

(1) G = Ground, I = Input, O = Output

Electrical Characteristics

Over -40°C to +105°C free-air temperature, PVIN = 24 V, VOUT = 5 V, IOUT = I OUT(max) , ƒsw = 500 kHz, CIN1 = 1 × 10-μF, 100-V 1210 ceramic, CIN2 = 1 × 100-μF 100-V electrolytic bulk, and COUT = 3 × 47-μF, 16-V 1210 ceramic (unless otherwise noted).

	PARAMETER	TEST	CONDITIONS	MIN	TYP	MAX	UNIT
INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )	INPUT VOLTAGE (PV IN )
PV IN	Input voltage range	Over I OUT range	Over I OUT range	4.5 (1)		60	V
		PV IN increasing	PV IN increasing		3.2	3.8	V
UVLO	PV IN undervoltage lockout	PV IN decreasing	PV IN decreasing		2.8		V
OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE	OUTPUT VOLTAGE
V OUT (ADJ)	Output voltage adjust range	Over I OUT range	Over I OUT range	2.5		7.5	V
V OUT (ADJ)	Set-point voltage tolerance	T A = 25°C, I OUT = 300 mA	T A = 25°C, I OUT = 300 mA		±0.7%	±1.5 (2)
V OUT (ADJ)	Temperature variation	-40°C ≤ T A ≤ 105°C, I OUT = 0 A	-40°C ≤ T A ≤ 105°C, I OUT = 0 A		±0.9%
V OUT	Line regulation	T A = 25°C, Over PV IN range, I OUT = 300 mA	T A = 25°C, Over PV IN range, I OUT = 300 mA		±0.1%
V OUT (ADJ)	Load regulation	T A = 25°C, I OUT = 300 mA to I OUT max	T A = 25°C, I OUT = 300 mA to I OUT max		±0.3%
V OUT (ADJ)	Total output voltage variation	Includes set-point, line, load, and temperature	Includes set-point, line, load, and temperature		±2%
V OUT ripple	Output voltage ripple	20-MHz Bandwidth	20-MHz Bandwidth		10%		mV/pp
OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT	OUTPUT CURRENT
I OUT	Output current	T A = 105°C, natural convection	T A = 105°C, natural convection	0		1.5	A
I OUT	Output current	T A = 105°C, 200LFM	T A = 105°C, 200LFM	0		2	A
I OUT	Output current	T A = 95°C, natural convection	T A = 95°C, natural convection	0		2	A
I LIM	Overcurrent threshold				2.5		A
PERFORMANCE	PERFORMANCE	PERFORMANCE	PERFORMANCE	PERFORMANCE	PERFORMANCE	PERFORMANCE	PERFORMANCE
η		PV IN = 12 V I OUT = 1 A	V OUT = 7.5 V, ƒ SW = 400 kHz		95%
η		V	OUT = 5 V, ƒ SW = 200 kHz		93%
η		PV IN = 12 V I OUT = 1 A	V OUT = 5 V, ƒ SW = 500 kHz		92%
η		PV IN = 12 V I OUT = 1 A	V OUT = 3.3 V, ƒ SW = 200 kHz		90%
η		PV IN = 12 V I OUT = 1 A	V OUT = 2.5 V, ƒ SW = 200 kHz		87%
η	Efficiency	PV IN = 12 V I OUT = 1 A	V OUT = 7.5 V, ƒ SW = 400 kHz		92%
η		PV IN = 12 V I OUT = 1 A	V OUT = 5 V, ƒ SW = 250 kHz		90%
η		PV IN = 24 V I = 1 A	V OUT = 5 V, ƒ SW = 500 kHz		88%
η		OUT	V OUT = 3.3 V, ƒ SW = 250 kHz		86%
η		PV IN = 12 V I OUT = 1 A	V OUT = 2.5 V, ƒ SW = 250 kHz		81%
	Transient response	I OUT = 50% load step 1 A/μs slew rate	Recovery time		100		μs
	Transient response	I OUT = 50% load step 1 A/μs slew rate	Over/Undershoot		2%
SLOW START	SLOW START	SLOW START	SLOW START	SLOW START	SLOW START	SLOW START	SLOW START
t SS	Internal soft-start time	SS/TR pin open	SS/TR pin open		4.1		ms
INHIBIT	INHIBIT	INHIBIT	INHIBIT	INHIBIT	INHIBIT	INHIBIT	INHIBIT
V INH (high)	Inhibit control	Precision inhibit level	Precision inhibit level	2.00	2.1	2.42	V
V INH (hys)		Inhibit turn-off hysteresis	Inhibit turn-off hysteresis		-0.294		V
I I (shutdown)	Input shutdown supply current	INH/UVLO pin conected to AGND	INH/UVLO pin conected to AGND		2.4	6.2 (3)	μA
POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)	POWER GOOD (PWRGD)
V PWRGD	PWRGD thresholds	V OUT rising V falling OUT	Good Fault Fault Good		95% 110% 90% 105%

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

		MIN	MAX	UNIT
	PVIN, INH/UVLO	-0.3	65	V
	VOUT, SENSE+, VBSEL	-0.3	30 (2)	V
Input voltage	VADJ, VERSA-COMP, RT, RTSEL, SS/TR	-0.3	3.6	V
	PWRGD, PWRGD_PU	-0.3	15	V
	CLK	-0.3	5.5	V
Output voltage	PH	-0.3	65	V
Operating junction temperature	(3)	-40	125	°C
Storage temperature	Storage temperature	-65	150	°C
Peak Reflow Case Temperature (4)	Peak Reflow Case Temperature (4)		245 (5)	°C
Maximum Number of Reflows Allowed (4)	Maximum Number of Reflows Allowed (4)		3 (5)
Mechanical shock	Mil-STD-883D, Method 2002.3, 1 msec, 1/2 sine, mounted		1500	G
Mechanical vibration	Mil-STD-883D, Method 2007.2, 20-2000Hz		20	G

(3) See temperature derating curves in the Typical Characteristics section for thermal information.

(4) For soldering specifications, refer to the Soldering Requirements for BQFN Packages application note.

(5) Devices with a date code prior to week 14 2018 (1814) have a peak reflow case temperature of 240°C with a maximum of one reflow

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

		MIN	MAX	UNIT
PVIN	Input voltage	4.5	60	V
V OUT	Output voltage	2.5	7.5	V
ƒ SW	Switching frequency	200	1000	kHz
T A	Operating ambient temperature	-40	105	°C

Thermal Information

THERMAL METRIC	(1)	LMZ36002 RVQ (QFN) 43 PINS	UNIT
R θ JA	Junction-to-ambient thermal resistance	14	°C/W
ψ JT	Junction-to-top characterization parameter	2.6	°C/W
ψ JB	Junction-to-board characterization parameter	9	°C/W

Typical Application

The LMZ36002 is a synchronous step down DC-DC power module. It is used to convert a higher DC voltage to a lower DC voltage with a maximum output current of 2 A. The following design procedure can be used to select components for the LMZ36002. Alternately, the WEBENCH ® software may be used to generate complete designs. When generating a design, the WEBENCH software utilizes an iterative design procedure and accesses comprehensive databases of components.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
LMZ36002	Texas Instruments	—
LMZ36002RVQR	Texas Instruments	—
LMZ36002RVQR.A	Texas Instruments	—
LMZ36002RVQT	Texas Instruments	—
LMZ36002RVQT.A	Texas Instruments	—

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