Performance Specification Summary
2
Performance Specification Summary
Specification
Conditions
MIN
TYP
MAX
UNIT
Input dc voltage, IN
2.0
5.5
V
Output dc voltage, OUT
Adjustable by changing external resistors from 1.3 V to
1.8
V
5.3 V
VBAT_OK threshold
Adjustable by changing external resistors from OUT to
2.9
V
5.3 V
Output current
0
200
mA
3
Test Summary
3.1
Recommended Equipment
•
Adjustable dc power supply between 2.0 V and 5.5 V with the adjustable current limit set to
approximately 400 mA
•
Load: system load or resistive load
≥
9
Ω
•
Two digital multimeters configured to measure voltage (equivalent or better)
•
Two digital multimeters configured to measure current (equivalent or better).
NOTE:
Due to the input
current pulses inherent to a hysteretically-controlled converter, the input current meter must be capable
of filtering and/or averaging in order to measure the correct value. Adding a large (> 100 µF) capacitor
between IN and GND may be used to assist with filtering; however, such capacitors tend to have high
leakage currents that may artificially increase quiescent current measurements at no load. Use of a
sourcemeter, configured to regulate voltage and measure current, or power, or both current and power
is also recommended when taking efficiency measurements.
•
Oscilloscope with up to four voltage probes
3.2
Equipment and EVM Setup
Table 1. Setup I/O Connections and Configuration for Measuring Efficiency of TPS62737 EVM
Jack and
Description
Connect or Adjustment To:
Component (Silk
Screen)
J1 (IN)
Negative lead of current meter (CM#1)
J2-1 (+ IN SNS)
Kelvin connection to capacitance
Positive lead of voltmeter (VM#1)
J2-2 (- GND SNS)
Kelvin connection to capacitance
Negative lead of voltmeter (VM#1)
J3 (GND)
Power supply negative lead
J4 (OUT)
Positive lead of current meter (CM#2)
J5-1 (+ OUT SNS)
Kelvin connection to capacitance
Positive lead of voltmeter (VM#2)
J5-2 (- GND SNS)
Kelvin connection to capacitance
Negative lead of voltmeter (VM#2)
J6 (GND)
Negative lead to load resistance
J7-1 (VIN_OK)
Push-pull output of comparator that indicates
n/a
the status of the input voltage
J7-2 (GND)
n/a
JP1 (EN1)
EN1 = HI and EN2 = x implements full standby
EN1 = LO
mode. Switching converter and VIN_OK
indication is off (ship mode).
JP2 (EN2)
EN1 = LO and EN2 = HI implements full buck
EN2 = HI
converter mode. EN1 = LO and EN2 = LO
implements partial standby mode. Switching
converter is off, but VIN_OK indication is on.
4
Evaluation Module for TPS62737 Ultra Low Power Buck Converter
SLVU939A – July 2013 – Revised August 2014
Copyright © 2013–2014, Texas Instruments Incorporated
