Datasheet

S001

Vout 2.1 V or 2.3 V

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Test Summary

4.1 Equipment

• Adjustable dc power supply between 1.8 V and 4 V with adjustable current limit set to approximately

150 mA

• Load: system load or resistive load ≥ 21 Ω

• Three Fluke 75 DMMs (equivalent or better)

• Oscilloscope, model TDS222 (equivalent or better)

4.2 Equipment and EVM Setup

Table 1. Setup I/O Connections and Configuration for Evaluation of TPS62730, TPS62733 EVM

Jack and Component (Silk Connect or Adjustment To:

Screen)

J1 (Vin) Power supply positive lead, preset to 3.3 VDC, 150-mA current limit

J2-1 (+ SNS); input Positive lead of DMM #1

J2-2 (- SNS); input Negative lead of DMM #1

J3 (GND) Power supply negative lead (3.3 VDC supply)

J4 (Vout) Positive lead to system load or load resistance

J5-1 (+ SNS); output Positive lead of DMM #2

J5-2 (- SNS); output Negative lead of DMM #2

J6 (GND) Negative lead to system load or load resistance

J7-1 (STAT) Positive lead of DMM meter #3

J7-2 (GND) Negative lead of DMM meter #3

JP1 (ON) Apply shunt to ON (across pins 1 and 2) for converter operation

JP1 (Bypass) Do not apply shunt to Bypass (across pins 2 and 3) until procedure calls for change.

Connect the meters, scope probes, output load, shunt, and input power supply as listed in Table 1 and set

the oscilloscope to 200 ns/div, positive trigger, dc-coupled on CH1, ac-coupled and 10 mV/div on CH2.

Use additional channels or move probes as required view Vin, Vstat and Vbypass. Replace the resistive

load with a system load or decade load box if desired to vary the load between 1 kΩ and 21 Ω.

Figure 1. EVM Schematic and Evaluation Setup

SLVU455A–April 2011–Revised August 2012 TPS62730, TPS62733 Stepdown Converters With Bypass Mode for Ultralow-

Power Wireless Applications

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