TPS7H1111EVM-CVAL Evaluation Module (EVM)

1 TPS7H1111EVM-CVAL

This user’s guide describes operational use of the TPS7H1111EVM-CVAL evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS7H1111-SP, a 1.5-A, Ultra-Low Noise, High PSRR, Radiation-Hardness-Assured RF Low Drop Out (LDO) regulator. This user's guide provides details about the EVM, its configuration, schematics, and bill of material (BOM).

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1 Introduction

The TPS7H1111-SP is an ultra-low noise, high PSRR, low dropout linear regulator (LDO) optimized for powering RF (radio frequency) devices in a space environment. It is capable of sourcing up to 1.5 A over a 0.85-V to 7-V input range with a 2.2-V to 14-V bias supply.

The EVM is configured with a default output resistor to regulate to a 1.8 V V_OUT, with a usable V_IN range of
(1.8 V + V_DO) to 7 V with V_BIAS range of (V_OUT + 1.6 V to 14 V). Worst case V_DO ranges from 430mV for V_BIAS ≥ (V_OUT + 1.6 V) to 1.4 V with V_BIAS = V_IN across recommended operating conditions. The EVM is intended to aid engineers in the evaluation of the operation and performance of the TPS7H1111-SP linear regulator. The TPS7H1111-SP low-dropout regulator allows input voltages from 0.85 V to 7 V and is capable of regulating any output voltage between 0.4 V and up to 5.5 V by changing the V_OUT current setting resistor R8. The EVM is capable of delivering up to 1.5 A to a load. Achieving the maximum load depends on multiple variables, including the input-output power dissipation, board thermal dissipation, and heat removal.

Figure 1-1 TPS7H1111EVM-CVAL (LP052B)

1.1 Related Information

TPS7H1111-SP data sheet (SLVSFT8)

1.2 Features

Radiation Performance
- Radiation hardness assurance (RHA) up to a total ionizing dose (TID) of 100 krad(Si)
- Single-event latchup (SEL), single-event burnout (SEB), and single-event gate rupture (SEGR) immune to linear energy transfer (LET) = 75 MeV-cm²/mg
- Single-event functional interrupt (SEFI) and single-event transient (SET) characterized to LET = 75 MeV-cm²/mg
Ultra-Low Noise: 1.71 µV_RMS (typ), 10 Hz - 100 kHz
High power-supply rejection ratio, PSRR (typ):
- 109 dB at 100 Hz
- 71 dB at 100 kHz
- 66 dB at 1 MHz
Input voltage range from 0.85 V to 7 V
Bias supply of 2.2 V to 14 V to minimize power dissipation
Output voltage as low as 0.4 V
Up to 1.5-A output current
Excellent output accuracy over line and load:
- +1.1% / –1.3% across temperature
- +0.9% / -0.7% at 25°C
Low-dropout: 215 mV (typ) at 1.5 A
Programmable soft start control (SS_SET)
Open-drain power good (PG) indicator
Configurable power good threshold (FB_PG)
Exposed control loop with the external compensation STAB pin
Internal current limit with configurable behavior
Capable of current sharing to enable higher currents