TPS7A39
www.ti.com.cn
ZHCSGP0A –JULY 2017–REVISED SEPTEMBER 2017
7 Detailed Description
7.1 Overview
The TPS7A39 is an innovative linear regulator (LDO) targeted at powering the signal chain, capable of up to
±33 V on the inputs and regulating up to ±30 V on the outputs at up to 150 mA of load current. The device uses
an LDO topology that, by design, delivers ratiometric start-up tracking in most applications. The TPS7A39 has
several other features, as listed in 表 1, that simplify using the device in a variety of applications.
注
Throughout this document, x is used to designate that the condition or component applies
to both the positive and negative regulators (for example, CFFx means CFFP and CFFN).
表 1. TPS7A39 Features
VOLTAGE REGULATION
Reference input/output
High-PSRR output
SYSTEM START-UP
Ratiometric start-up tracking
Programmable soft-start
Sequencing controls
INTERNAL PROTECTION
Current limit
Thermal shutdown
Fast transient response
7.2 Functional Block Diagram
Positive LDO
INP
+
UVLO P
+
œ
œ
2.6 V
OUTP
Internal
Enable
Current
Limit
FBP
350 kꢀ
Bandgap
INP
Reference
NR/SS
BUF
x1
UVLO P
Internal Enable
EN
UVLO N
FBN
Current
Limit
Thermal
Shutdown
OUTN
Internal
Enable
œ
+
UVLO N
- 2.6 V
+
œ
INN
Negative LDO
GND
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19
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