MIC2800_07 Datasheet, PDF (4/20 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs

Micrel, Inc.
Absolute Maximum Ratings⁽¹⁾
Supply Voltage (V_IN) ............................................. 0V to +6V
Enable Input Voltage (V_EN)................................... 0V to +6V
LOWQ Mode (V_LOWQ). .......................................... 0V to +6V
Power Dissipation, Internally Limited⁽³⁾
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (T_s) .........................–65°C to +150°C
EDS Rating⁽⁴⁾.................................................................. 2kV
MIC2800
Operating Ratings⁽²⁾
Supply voltage (V_IN) ..................................... +2.7V to +5.5V
Enable Input Voltage (V_EN)..................................... 0V to V_IN
LOWQ Mode (V_LOWQ). ............................................ 0V to V_IN
Junction Temperature (T_J) ........................ –40°C to +125°C
Junction Thermal Resistance
MLF-16 (θ_JA) ......................................................45°C/W
Electrical Characteristics⁽⁵⁾
V_IN = EN1 = EN2 = LOWQ = V_OUT⁽⁶⁾ + 1V; C_OUTDC/DC = 2.2µF, C_OUT1 = C_OUT2 = 2.2µF; I_OUTDC/DC = 100mA;
I_OUTLDO1 = I_OUTLDO2 = 100µA; T_J = 25°C, bold values indicate –40°C < T_J < +125°C; unless noted.
Parameter
UVLO Threshold
UVLO Hysteresis
Ground Pin Current
Conditions
Rising input voltage during turn-on
V_FB = GND (not switching);
Min Typ
2.45 2.55
100
800
LDO2 Only (EN1 = LOW)
55
Ground Pin Current in
Shutdown
All EN = 0V
Ground Pin Current
(LOWQ mode)
I_DC/DC < I_LDO1 < I_LDO2 < 10mA
DC/DC and LDO1 OFF; I_LDO2 < 10mA
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
Enable Inputs (EN1; EN2; /LOWQ )
Enable Input Voltage
Logic Low
Logic High
Enable Input Current
V_IL < 0.2V
V_IH > 1.0V
Turn-on Time (See Timing Diagram)
Turn-on Time
(LDO1 and LDO2)
Turn-on Time (DC/DC)
EN2=V_IN
EN1=V_IN
EN2=V_IN; I_LOAD = 300mA; C_BYP = 0.1µF
POR Output
VTH
Low Threshold, % of nominal (V_DC/DC or V_LDO1 or V_LDO2)
(Flag ON)
VOL
High Threshold, % of nominal (V_DC/DC AND V_LDO1 AND
V_LDO2) (Flag OFF)
POR Output Logic Low Voltage; IL = 250µA
IPOR
Flag Leakage Current, Flag OFF
SET INPUT
SET Pin Current Source
VSET = 0V
SET Pin Threshold Voltage
POR = High
0.2
30
20
160
23
1.0
0.1
0.1
240
120
83
90
91
96
10
0.01
0.75 1.25
1.25
Max
2.65
1100
85
95
5
60
80
70
0.2
1
1
500
350
350
99
100
1
1.75
Units
V
mV
µA
µA
µA
µA
µA
µA
µA
°C
°C
V
V
µA
µA
µs
µs
µs
%
%
mV
µA
µA
V
September 2007
4
M9999-090507-C