EL7554 View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
EL7554 Datasheet PDF : 14 Pages
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EL7554
DC Electrical Specifications VDD = VIN = 3.3V, TA = TJ = 25°C, COSC = 390pF, Unless Otherwise Specified
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP
VEN_HI
VEN_LO
IEN
TM, SEL_HI
TM, SEL_LO
EN Input High Level
EN Input Low Level
Enable Pull-up Current
Input High Level
Input Low Level
VEN = 0
2.6
-4
-2.5
2.6
MAX
1
1
UNIT
V
V
µA
V
V
Pin Descriptions
PIN NUMBER
PIN NAME
1
COMP
2
VREF
3
FB
4
VO
5
VTJ
6
TM
7
SEL
8, 9, 10, 11, 12, 13
14, 15
16, 17, 18
19, 20, 21
22
23
LX
NC
PGND
VIN
VDD
PG
24
EN
25
STP
26
STN
27
COSC
28
SGND
PIN FUNCTION
Error amplifier output; place loop compensation components here
Bandgap reference bypass capacitor; typically 0.01µF to 0.047µF to SGND
Voltage feedback input; connected to external resistor divider between VOUT and SGND for adjustable
output; also used for speed-up capacitor connection
Output sense for fixed output; also used for speed-up capacitor connection
Junction temperature monitor output, connected to a 0.01µF - 0.047µF to SGND
Stress test enable; allows ±5% output movement; needs a pull-down resistor (1K - 100K); connect to
SGND if function is not used
Positive or negative voltage margining set pin; needs a pull-down resistor (1K - 100K); connect to
SGND if function is not used
Inductor drive pin; high current output whose average voltage equals the regulator output voltage
Not used
Ground return of the regulator; connected to the source of the low-side synchronous NMOS Power FET
Power supply input of the regulator; connected to the drain of the high-side PMOS Power FET
Control circuit positive supply; connected to VIN through an internal 20Ω resistor
Power-good window comparator output; logic 1 when regulator output is within ±10% of target output
voltage
Chip enable, active high; a 2µA internal pull-up current enables the device if the pin is left open; a
capacitor can be added at this pin to delay the start of a converter
Auxilliary supply tracking positive input; tied to regulator output to synchronize start-up with a second
supply; leave open for standalone operation; 2µA internal pull-up current
Auxiliary supply tracking negative input; connect to output of a second supply to synchronize start-up;
leave open for standalone operation; 2µA internal pull-up current
Oscillator timing capacitor (see performance curves)
Control circuit negative supply or signal ground
4
FN7360.4
May 8, 2006
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