EP5357LUI/EP5357HUI
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNITS
Minimum VIN-VOUT to ensure
proper LLM operation
LLM Engage Headroom
600
mV
LLM Pin Logic Low
LLM Pin Logic High
LLM Pin Current
VLLMLO
VLLMHI
ILLM
0.3
V
V
1.4
<100
5
nA
MHz
Operating Frequency
Soft Start Operation
FOSC
EP5357HUI (VID MODE)
EP5357LUI (VID MODE)
8
4
Soft Start Slew Rate
VOUT Rise Time
V/mS
uSec
ΔVSS
TRISE
Time to 90% VOUT (VFB MODE)
180
250
Note 1: Parameter guaranteed by design
Typical Performance Characteristics
95
90
95
90
85
80
75
70
65
60
55
50
45
LLM
LLM
85
80
75
70
65
60
55
50
45
PWM
PWM
10
100
1000
10
100
Load Current (mA)
1000
Load Current (mA)
Efficiency vs. Load Current: VIN = 5.0V, VOUT (from
top to bottom) = 3.3, 2.5, 1.8, 1.2V
Efficiency vs. Load Current: VIN = 3.7V, VOUT (from
top to bottom) = 2.5, 1.8, 1.2V
95
LLM
90
85
80
75
70
65
60
55
50
45
PWM
10
100
1000
Load Current (mA)
Efficiency vs. Load Current: VIN = 3.3V, VOUT (from
top to bottom) = 2.5, 1.8, 1.2V
©Enpirion 2012 all rights reserved, E&OE
5
www.enpirion.com
03409
September 12, 2012
Rev: D
ENPIRION [ ENPIRION, INC. ]
