EN6347QI
PARAMETER
SYMBOL
VPOKL
TEST CONDITIONS
With 4mA current sink into POK
2.5V 0 VIN 0 6.6V
MIN
TYP
MAX UNITS
POK Output low Voltage
POK Output Hi Voltage
0.4
VIN
V
V
VPOKH
POK pin VOH leakage
current (Note 1)
IPOKL
POK high
1
µA
mV
V
Minimum VIN-VOUT to ensure proper
LLM operation
LLM Engage Headroom
800
LLM Logic Low
VLLM_LO
LLM Static Logic Level
0.3
(LLM/SYNC PIN)
LLM Logic High
(LLM/SYNC PIN)
VLLM_HI
LLM Static Logic Level
LLM/SYNC Pin is <2.5V
1.5
V
LLM/SYNC Pin Current
<100
nA
Note 1: Parameter guaranteed by design.
Note 2: LLM operation is normally only guaranteed above the minimum specified output current. Contact Enpirion
Applications support for designs that need to operate at a lower IOUT
.
Note 3: For proper operation of the synchronization circuit, the high-level amplitude of the SYNC signal should not be
above 2.5V.
Typical Performance Characteristics
PWM/LLM Efficiency vs. Load Performance at Vin=3.3V
PWM/LLM Efficiency vs. Load Performance at Vin=5V
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
Vout=3.3
Vout=2.5
Vout=1.8
Vout=1.2
Vout=1
Vout=2.5
Vout=1.8
Vout=1.2
Vout=1
Vout=1
Vout=1
Vout=1.2
Vout=1.8
Vout=2.5
#REF!
Vout=1.2
Vout=1.8
Vout=2.5
Vout=3.3
0.01
0.1
1
10
0.01
0.1
1
10
Load (A)
Load (A)
Efficiency VIN = 3.3V, VOUT (From top to bottom) =
2.5, 1.8, 1.2, 1.0V
Efficiency VIN = 5.0V, VOUT (From top to bottom) =
3.3, 2.5, 1.8, 1.2, 1.0V
500 MHz BW
20 MHz BW limit
PWM Output Ripple: VIN = 3.3V, VOUT = 1.0V, IOUT = 4A
CIN = 22$F, COUT = 47$F/1206 + 10uF/0805
PWM Output Ripple: VIN = 3.3V, VOUT = 1.0V, IOUT = 4A
CIN = 22$F, COUT = 47$F/1206 + 10uF/0805
@Enpirion 2011 all rights reserved, E&OE
5
www.enpirion.com
05991
10/04/2011
Rev: B
ENPIRION [ ENPIRION, INC. ]
