LMZ10504DEMO/NOPB National Semiconductor, LMZ10504DEMO/NOPB Datasheet - Page 3

• Manufacturer Part Number: LMZ10504DEMO/NOPB
• Description: BOARD DEV PWR MODULE LMZ10504
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r

Specifications of LMZ10504DEMO/NOPB

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 2.5V
• Current - Output: 4A
• Voltage - Input: 2.95 ~ 5.5 V
• Regulator Topology: Buck
• Frequency - Switching: 1MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LMZ10504
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LMZ10504DEMO

VIN, GND, VOUT
Demo Board Bill of Materials
* Not installed
Demo Board Hookup
VOUT Connect the load to VOUT and one of the GND posts.
The module can source up to a 4A load current.
VIN Connect VIN to a positive voltage in the 2.95 to 5.5V
range. Connect the negative terminal of the source supply to
one of the posts labeled GND.
EN The enable is configured with a 100 kΩ pull up resistor,
which enables the LMZ10504, but also allows the user to dis-
able the LMZ10504, by pulling low on the EN post.
Quiescent current If the enable post is pulled low, the mod-
ule will be disabled and about 260 µA of supply current will
flow into VIN (pin 1). To enable the device, leave the enable
C
in1
Ref Des
EN, SS
TABLE 1. Output Voltage Setting (R
, C
C
R
R
C
C
R
R
U1
comp
comp
in2
fbb
fbt
en
o1
ss
, C
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
0.9 V
V
o2
OUT
SIMPLE SWITCHER®
120 pF, 5%, C0G, 50V
220 µF, 10V, AL-Elec
10 nF, 5%, C0G, 25V
47 µF, X5R, 6.3V
Turret Terminal
Turret Terminal
Description
34.8 kO
100 kO
1.1 kO
75 kO
23.7 kΩ
34.8 kΩ
84.5 kΩ
150 kΩ
590 kΩ
59 kΩ
R
fbt
fbb
= 75 kΩ)
TO-PMOD
Case Size
1502-2
1593-2
1210
603
603
603
603
603
603
E
National Semiconductor
3
Manufacturer
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Panasonic
post open, there will be approximately 12 mA of no-load qui-
escent current into the VIN post. (VIN to ground voltage at the
post set to 3.3V).
Demo Board Passive Components
Soft-start capacitor The soft-start capacitor controls the rise
time of the output voltage when power is first applied and fol-
lowing the clearing of a fault mode.
Feedback divider Regulator output voltage is programmed
though the selection of the two resistors, R
C
vider resistor, R
and will improve the step response to abrupt changes in load
current and input voltage.
Output Capacitor Parallel connections of two 47 µF 6.3V
multilayer ceramic are used for the output capacitor.
Input Capacitor A 47 µF 6.3V multilayer ceramic (C
plies the fast switching current generated from the quick rise
time of the internal MOSFET. C
for the input line. Additionally, C
placeholder for an aluminum capacitor to reduce the reso-
nance of the input line produced by the inductance and re-
sistance in the cables connecting the bench power supply to
the evaluation board and the input capacitors.
Keystone
Keystone
comp
TDK
TDK
TDK
R
comp
is located in parallel with the upper feedback di-
fbt
. These components adjust the control loop
CRCW060375K0FKEA
CRCW060334K8FKEA
CRCW06031K10FKEA
CRCW0603100KFKEA
C3225X5R0J476M
C1608C0G1H121J
C1608C0G1E103J
EEE-FPA221XAP
Manufacturer P/N
1502-2K-ND
1593-2K-ND
LMZ10504
in1
in2
is also the energy reservoir
is not installed, but is a
fbb
www.national.com
and R
in1
Quantity
) sup-
0*
1
3
1
1
1
1
1
1
4
2
fbt
.