L6730 STMicroelectronics, L6730 Datasheet - Page 9

• Manufacturer Part Number: L6730
• Description: IC CTRLR ADJ STPDN SYNC 20-TSSOP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6730

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adj to 0.6V
• Frequency - Switching: 100kHz ~ 1MHz
• Voltage - Input: 1.8 ~ 14 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Output Voltage: 0.6 V
• Input Voltage: 1.8 V to 14 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• For Use With: 497-5868 - EVAL BOARD 30A 400KHZ L6730497-5501 - EVAL BOARD FOR L6730XX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5291-5

L6730 - L6730B
Table 4.
Pin n.
10
4
5
6
7
8
9
SS/INH
EAREF
COMP
T
Name
Pin connection (continued)
GND
OSC
MASK
FB
The user can select two different values for the leading edge blanking
time on the peak overcurrent protection by connecting this pin to V
GND. The device captures the analog value present at this pin at the
start-up when V
All the internal references are referenced to this pin. Connect to the PCB
signal ground.
This pin is connected to the error amplifier inverting input. Connect it to
Vout through the compensation network. This pin is also used to sense
the output voltage in order to manage the over voltage conditions and the
PGood signal.
This pin is connected to the error amplifier output and used to
compensate the voltage control loop.
The soft-start time is programmed connecting an external capacitor from
this pin and GND. The internal current generator forces a current of 10mA
through the capacitor. This pin is also used to inhibit the device: when the
voltage at this pin is lower than 0.5V the device is disabled.
It is possible to set two internal references 0.6V / 1.2V or provide an
external reference from 0V to 2.5V:
V
V
V
An internal clamp limits the maximum V
captures the analog value present at this pin at the start-up when V
meets the UVLO threshold.
Connecting an external resistor from this pin to GND, the external
frequency can be increased according with the following equation:
Connecting a resistor from this pin to V
can be lowered according with the following equation:
If the pin is left open, the switching frequency is 400 KHz. Normally this
pin is at a voltage of 1.2V. In OVP the pin is pulled up to 4.5V (only in
latched mode). Don’t connect a capacitor from this pin to GND.
EAREF
EAREF
EAREF
Doc ID 11938 Rev 3
from 80% to 95% of V
from 95% to 100% of V
from 0% to 80% of V
CC
meets the UVLO threshold.
Fsw
Fsw
=
=
400
400
CCDR
CCDR
Description
KHz
KHz
CCDR
-> external reference
−
-> V
+
-> V
Pin connections and functions
R
CCDR
. 3
R
OSC
. 9
EAREF
REF
OSC
01
REF
88
(
⋅
K
=1.2V
10
(
(5V), the switching frequency
⋅
=0.6V
K
10
Ω
at 2.5V (typ.). The device
7
Ω
)
6
)
CCDR
CC
9/52
or