LED5000PHR STMicroelectronics, LED5000PHR Datasheet - Page 11

• Manufacturer Part Number: LED5000PHR
• Description: Current & Power Monitors & Regulators 3A monolithic Conv 850kHz Synch
• Manufacturer: STMicroelectronics

Specifications of LED5000PHR

• Rohs: yes
• Product: Current Regulators
• Supply Voltage - Max: 48 V
• Supply Voltage - Min: 5.5 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: HPSO-8
• Accuracy: +/- 3 %
• Input Voltage Range: 5.5 V to 48 V
• Output Current: 23 uA
• Sensing Method: High or Low Side
• Supply Current: 1.7 mA

LED5000
4.1
4.2
4.3
Power supply and voltage reference
The internal regulator circuit consists of a startup circuit, an internal voltage pre-regulator,
the bandgap voltage reference and the bias block that provides current to all the blocks. The
starter supplies the startup current to the entire device when the input voltage goes high and
the device is enabled (inhibit pin connected to ground). The pre-regulator block supplies the
bandgap cell with a pre-regulated voltage that has a very low supply voltage noise
sensitivity.
Voltage monitor
An internal block continuously senses the V
good, the regulator begins operating. There is also a hysteresis on the V
Figure 4.
Soft-start
The startup phase is implemented ramping the reference of the embedded error amplifier in
1 msec typ. time. It minimizes the inrush current and decreases the stress of the power
components at power up.
Figure 5.
Internal circuit
Soft-start open
Doc ID 023951 Rev 1
cc
, V
ref
and V
bg
. If the monitored voltages are
Functional description
cc
(UVLO).
AM13488v1
AM13489v1
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