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Renesas Electronics Components Datasheet

EL7535 Datasheet

Monolithic 350mA Step-Down Regulator

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EL7535
NOT RECOMMENDED FOR NEW DESIGNS
POSSIBLE SUBSTITUTE PRODUCT
(NOT PIN-FOR-PIN) ISL80019, ISL80019A
Monolithic 350mA Step-Down Regulator
DATASHEET
FN7003
Rev 7.00
December 9, 2015
The EL7535 is a synchronous, integrated FET 350mA
step-down regulator in a 10 Ld MSOP package. The regulator
is internally compensated, which makes it possible to use just
five tiny external components to form a complete DC/DC
converter. The regulator operates with an input voltage range
from 2.5V to 6V, which accommodates supplies of 3.3V, 5V, or
a Li-Ion battery source. The output can be externally set from
0.8V to VIN with a resistive divider.
The EL7535 features PWM mode control. The operating
frequency is typically 1.4MHz. Additional features include
<1µA shut-down current, short-circuit protection, and
over-temperature protection.
The EL7535 is available in the 10 Ld MSOP package and is
specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART
NUMBER
PART
MARKING
PACKAGE
PKG.
DWG. #
EL7535IYZ*
(Note)
BAACA
10 Ld MSOP
(Pb-free)
MDP0043
*Add “-T7” or “-T13” suffix for tape and reel. Please refer to TB347
for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
Pinout
EL7535
(10 LD MSOP)
TOP VIEW
1 SGND
2 PGND
3 LX
4 VIN
5 VDD
FB 10
VO 9
POR 8
EN 7
RSI 6
Features
• Extremely Small 350mA DC/DC Converter
• Max Height 1.1mm 10 Ld MSOP Package
• Possibly Uses Only Five Tiny External Components with
Fixed Output
• Power-On-Reset Output (POR)
• Internally-Compensated Voltage Mode Controller
• Up to 94% Efficiency
• <1µA Shut-Down Current
• Overcurrent and Over-Temperature Protection
• Pb-free Available (RoHS compliant)
Applications
• PDA and Pocket PC Computers
• Bar Code Readers
• Cellular Phones
• Portable Test Equipment
• Li-Ion Battery Powered Devices
• Small Form Factor (SFP) Modules
Typical Application Diagram
VS (2.5V TO 5.5V)
L1
R3 100
C2 C3
VIN
VDD
LX 1.8µH
C1
10µF
10µF
0.1µF
EL7535
VO
R5 100k
R4 100k
R6
100k
POR
EN
RSI
PGND
SGND
R1*
124k
FB
R2*
100k
C4
470pF
VO (1.8V @ 350mA)
*VO = 0.8V*(1 + R1/R2)
FN7003 Rev 7.00
December 9, 2015
Page 1 of 10


Renesas Electronics Components Datasheet

EL7535 Datasheet

Monolithic 350mA Step-Down Regulator

No Preview Available !

EL7535
Absolute Maximum Ratings (TA = +25°C)
VIN, VDD, POR to SGND . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VIN + +0.3V)
RSI, EN, VO, FB to SGND . . . . . . . . . . . . . . . -0.3V to (VIN + +0.3V)
PGND to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA
Thermal Information
Operating Ambient Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications VDD = VIN = VEN = 3.3V, C1 = C2 = 10µF, L = 1.8µH, VO = 1.8V, unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
DC CHARACTERISTICS
VFB
IFB
VIN, VDD
VIN,ON
Feedback Input Voltage
Feedback Input Current
Input Voltage
Maximum Voltage for Startup
VIN rising
Hysterisis
780 800 820 mV
250 nA
2.5 6 V
2.19 2.42 V
100 300 mV
IDD Supply Current
rDS(ON)-PMOS
rDS(ON)-NMOS
ILMAX
TOT,OFF
TOT,ON
IEN, IRSI
VEN1, VRSI1
VEN2, VRSI2
VPOR
PMOS FET Resistance
NMOS FET Resistance
Current Limit
Over-temperature Threshold
Over-temperature Hysteresis
EN, RSI Current
EN, RSI Rising Threshold
EN, RSI Falling Threshold
Minimum VFB for POR, WRT Targeted
VFB Value
VOLPOR
POR Voltage Drop
AC CHARACTERISTICS
PWM, VIN = VDD = 5V
EN = 0, VIN = VDD = 5V
VDD = 5V, wafer test only
VDD = 5V, wafer test only
T rising
T falling
VEN, VRSI = 0V and 3.3V
VDD = 3.3V
VDD = 3.3V
VFB rising
VFB falling
ISINK = 5mA
400 850
µA
0.1 1.5 µA
70 100 m
45 75 m
1.5 A
145 °C
130 °C
-1 1 µA
2.4 V
0.8 V
97 %
86 %
35 70 mV
fPWM
tRSI
PWM Switching Frequency
Minimum RSI Pulse Width
1.1 1.4 1.6 MHz
Limits established by characterization and
are not production tested
25 50 ns
tSS
tPOR
Soft-start Time
Power-On Reset Delay Time
650 µs
100 ms
FN7003 Rev 7.00
December 9, 2015
Page 2 of 10


Part Number EL7535
Description Monolithic 350mA Step-Down Regulator
Maker Renesas
Total Page 10 Pages
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