LTC3537EUD#PBF datasheet, PDF - EEWORLD Datasheet

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LTC3537EUD#PBF: DescriptionIC REG DL BST/LINEAR SYNC 16-QFN; Categorysemiconductor Power management; File Size382KB，5 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC3537EUD#PBF Overview

IC REG DL BST/LINEAR SYNC 16-QFN

LTC3537EUD#PBF Parametric

Parameter Name	Attribute value
Topology	Boost Synchronous(1), Linear(LDO)(1)
Function	any function
Number of outputs	2
Frequency - Switch	2.2MHz
Voltage/Current - Output 1	1.5 V ~ 5.25 V，100mA
Voltage/Current - Output 2	0.6 V ~ 5 V，100mA
Voltage/Current - Output 3	-
With LED driver	none
With monitor	none
with sequencer	yes
Voltage - Power	0.68 V ~ 5.5 V
Operating temperature	-40°C ~ 85°C
Installation type	surface mount
Package/casing	16-WFQFN Exposed Pad
Supplier device packaging	16-QFN-EP（3x3）

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600MA SYNCHRONOUS BOOST DC/DC CONVERTER AND 100MA LDO REGULATOR

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1242A

LTC3537

DESCRIPTION

Demonstration circuit 1242A includes a high ef-

ficiency synchronous boost converter, a low

dropout linear regulator and a low battery de-

tector. With a light load, the boost converter can

startup with an input voltage as low as 680mV

and once started, the input can go as low as

500mV while maintaining a regulated output

voltage. With a 50mA load, the linear regulator

features a dropout voltage of less than 100mV.

Separate input terminals are provided for the

boost and linear regulator, and a jumper that

allows the linear regulator to be powered from

any one of three different sources.

Terminals and jumpers for shutting down or se-

quencing each regulators output separately and

individual Power-Good outputs are included.

Jumpers are also provided for selecting a total

of six output voltages, three low battery volt-

ages and a jumper to select BURST or PWM

Table 1. Typical Specifications (25°

Conditions

Input Voltage Range V

Boost 1.8V V

OUT

Boost 3.3V V

OUT

Boost 5V V

OUT

Output Ripple Voltage (burst mode)

Output Ripple Voltage (fixed frequency)

Boost Efficiency

LDO Regulator 1.5V V

OUT

LDO Regulator 3.0V V

OUT

LDO Regulator 3.3V V

OUT

LDO Regulator Drop Out Voltage

Low Battery Threshold Voltage (dropping) 0.8V

Low Battery Threshold Voltage (dropping) 1.7V

Low Battery Threshold Voltage (dropping) 3.0V

= 1V, I

OUT

= 100mA

= 1.5V, I

OUT

= 200mA

= 1.5V, I

OUT

= 200mA

= 1.5V, V

OUT

= 3.3V I

OUT

= 15mA

= 1.5V, V

OUT

= 3.3V I

OUT

= 200mA

= 1.8V, V

OUT

= 3.3V I

OUT

= 100mA

= 5V, I

OUT

= 50mA

= 5V, I

OUT

= 50mA

= 5V, I

OUT

= 50mA

Limits

0.68V to 5.5V

1.8V ± 3.5%

3.3V ± 3.5%

5.0V ± 3.5%

30mV p-p

10mV p-p

88%

1.5V ± 2.5%

3.0V ± 2.5%

3.3V ± 2.5%

800mV ± 5%

1.7V ± 5%

3V ± 5%

operation. The 3X3 mm QFN thermally en-

hanced package with a 2.2MHz switching fre-

quency combined with the LDO regulator pro-

vide a very tiny multi output solution. The

LTC3537 boost converter also features output

disconnect and the input voltage can be greater

or less than the output voltage.

This demonstration circuit allows the user to

quickly evaluate the LTC3537 performance.

Jumpers make selecting different output volt-

ages and low battery thresholds simple while

terminals on the board allow easy hookup to

input supplies and output loads.

Design files for this circuit board are available.

Call the LTC factory.

LTC and Burst Mode are trademarks of Linear Technol-

ogy Corporation

OUT

= 3.3V, I

OUT

= 50mA,

OUT

drops 10%

100mV

LTC3537EUD#PBF Related Products

	LTC3537EUD#PBF	DC1242A	LTC3537EUD#TRPBF
Description	IC REG DL BST/LINEAR SYNC 16-QFN	board eval for ltc3537eud	IC REG DL BST/LINEAR SYNC 16-QFN
Topology	Boost Synchronous(1), Linear(LDO)(1)	-	Boost Synchronous(1), Linear(LDO)(1)
Number of outputs	2	-	2
Frequency - Switch	2.2MHz	-	2.2MHz
Voltage/Current - Output 1	1.5 V ~ 5.25 V，100mA	-	1.5 V ~ 5.25 V，100mA
Voltage/Current - Output 2	0.6 V ~ 5 V，100mA	-	0.6 V ~ 5 V，100mA
With LED driver	none	-	none
With monitor	none	-	none
with sequencer	yes	-	yes
Voltage - Power	0.68 V ~ 5.5 V	-	0.68 V ~ 5.5 V
Operating temperature	-40°C ~ 85°C	-	-40°C ~ 85°C
Installation type	surface mount	-	surface mount
Package/casing	16-WFQFN Exposed Pad	-	16-WFQFN Exposed Pad
Supplier device packaging	16-QFN-EP（3x3）	-	16-QFN-EP（3x3）

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