PM6680 STMicroelectronics, PM6680 Datasheet - Page 10

IC CTRLR DUAL STEP DOWN 32VFQFPN

PM6680

Manufacturer Part Number
PM6680
Description
IC CTRLR DUAL STEP DOWN 32VFQFPN
Manufacturer
STMicroelectronics
Datasheet

Specifications of PM6680

Applications
Controller, Notebook Power System
Voltage - Input
6 ~ 28 V
Number Of Outputs
2
Voltage - Output
0.9 ~ 5.5 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-VFQFN, 32-VFQFPN
Output Voltage
5 V, 0.9 V to 5.5 V, 0.9 V to 3.3 V
Output Current
0.33 A
Input Voltage
5.5 V to 28 V
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 10 C
For Use With
497-6379 - BOARD EVALUATION FOR PM6680A497-6378 - BOARD EVALUATION FOR PM6680497-6425 - BOARD EVAL BASED ON PM6680A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Pin settings
10/49
Table 4.
16
17
18
19
20
21
22
23
24
25
26
27
28
CSENSE1
PGOOD1
PGOOD2
PHASE1
HGATE1
SGND2
BOOT1
V5SW
LDO5
SKIP
EN1
FB1
VIN
Pin
Pin functions (continued)
Signal ground for analog circuitry. It must be connected to the signal ground
plan of the power supply.
Internal 5 V regulator bypass connection.
• If V5SW is connected to OUT5 (or to an external 5 V supply) and V5SW is
greater than 4.9 V, the LDO5 regulator shuts down and the LDO5 pin is
directly connected to OUT5 through a 3 Ω (max) switch.
If V5SW is connected to GND, the LDO5 linear regulator is always on.
5 V internal regulator output. It can provide up to 100mA peak current.
LDO5 pin supplies embedded low side gate drivers and an external load.
Device supply voltage input and battery voltage sense. A bypass filter (4 Ω
and 4.7 µF) between the battery and this pin is recommended.
Positive current sense input for the switching section 1. This pin must be
connected through a resistor to the drain of the synchronous rectifier
(R
supply controller.
Switch node connection and return path for the high side driver for the
section 1.It is also used as negative current sense input.
High-side gate driver output for section 1. This is the floating gate driver
output.
Bootstrap capacitor connection for the switching section 1. It supplies the
high-side gate driver.
Pulse skipping mode control input.
• If the pin is connected to LDO5 the PWM mode is enabled.
• If the pin is connected to GND, the pulse skip mode is enabled.
• If the pin is connected to VREF the pulse skip mode is enabled but the
switching frequency is kept higher than 33 kHz (No-audible pulse skip
mode).
Enable input for the switching section 1.
• The section 1 is enabled applying a voltage greater than 2.4 V to this pin.
• The section 1 is disabled applying a voltage lower than 0.8 V.
When the section is disabled the High Side gate driver goes low and Low
Side gate driver goes high.
Power Good output signal for the section 1. This pin is an open drain output
and when the output of the switching section 1 is out of +/- 10 % of its
nominal value.It is pulled down.
Power Good output signal for the section 2. This pin is an open drain output
and when the output of the switching section 2 is out of +/- 10 % of its
nominal value.It is pulled down.
Feedback input for the switching section 1. This pin is connected to a
resistive voltage-divider from OUT1 to PGND to adjust the output voltage
from 0.9 V to 5.5 V.
DSON
sensing) to obtain a positive current limit threshold for the power
Function
PM6680

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