EL7564CM Intersil, EL7564CM Datasheet - Page 5

• Manufacturer Part Number: EL7564CM
• Description: IC REG 4A DC-DC STEP DN 20-SOIC
• Manufacturer: Intersil
• Type: Step-Down (Buck)r

Specifications of EL7564CM

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1 ~ 3.8 V
• Current - Output: 4A
• Frequency - Switching: 1MHz
• Voltage - Input: 4.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Power - Output: 13W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Descriptions
Typical Performance Curves
20-PIN SO
11, 12, 13
(0.300”)
14, 15
6, 7
10
16
17
18
19
20
1
2
3
4
5
8
9
100
95
90
85
80
75
70
65
60
0
V
IN
FIGURE 1. EL7564CM EFFICIENCY
=5V
0.5
18, 19, 20, 21,
HTSSOP
6, 7, 8, 9
28-PIN
10, 11
15, 16
22, 23
1
13
14
24
25
26
27
28
V
1
2
3
4
5
O
LOAD CURRENT I
=2.8V
1.5
5
V
2
PIN NAME
O
=1.8V
SGND
COSC
PGND
PGND
VREF
VDRV
VDD
STP
STN
VTJ
VIN
VHI
PG
EN
LX
FB
2.5
O
(A)
V
3
O
=3.3V
Bandgap reference bypass capacitor; typically 0.1µF to SGND
Control circuit negative supply or signal ground
Oscillator timing capacitor (see performance curves)
Control circuit positive supply; normally connected to VIN through an RC filter
Junction temperature monitor; connected with 2.2nF to 3.3nF to SGND
Ground return of the regulator; connected to the source of the low-side synchronous NMOS
Power supply input of the regulator; connected to the drain of the high-side NMOS power FET
Auxiliary supply tracking positive input; tied to regulator output to synchronize start up with a
Auxiliary supply tracking negative input; connect to output of a second supply to synchronize
Ground return of the regulator; connected to the source of the low-side synchronous NMOS
Positive supply of high-side driver; boot strapped from VDRV to LX with an external 0.22µF
Positive supply of low-side driver and input voltage for high side boot strap
Power good window comparator output; logic 1 when regulator output is within ±10% of target
Chip enable, active high; a 2µA internal pull up current enables the device if the pin is left open;
power FET
second supply; leave open for stand alone operation; 2µA internal pull down current
start up; leave open for stand alone operation; 2µA internal pull up current
power FET
Inductor drive pin; high current output whose average voltage equals the regulator output
voltage
capacitor
output voltage
Voltage feedback input; connected to external resistor divider between VOUT and SGND; a
125nA pull-up current forces VOUT to SGND in the event that FB is floating
a capacitor can be added at this pin to delay the start of converter
3.5
4
EL7564
100
95
90
85
80
75
70
65
60
0.1
PIN FUNCTION
V
IN
FIGURE 2. EL7564CRE EFFICIENCY
=5V
0.6
1.1
1.6
V
O
I
=2.5V
O
2.1
(A)
2.6
3.1
V
V
O
O
=3.3V
=1.8V
3.6
May 9, 2005
4.1
FN7297.3