MCP1602 Datasheet, PDF (4/26 Pages) Microchip Technology – 2.0 MHz, 500 mA Synchronous Buck Regulator with Power-Good

MCP1602
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
V_IN - A_GND ......................................................................+6.0V
All Other I/O .............................. (A_GND - 0.3V) to (V_IN + 0.3V)
LX to P_GND ............................................. -0.3V to (V_IN + 0.3V)
Output Short Circuit Current..................................Continuous
Power Dissipation (Note 6) ..........................Internally Limited
Storage Temperature.................................... -65^oC to +150^oC
Ambient Temp. with Power Applied................ -40^oC to +85^oC
Operating Junction Temperature.................. -40^oC to +125^oC
ESD Protection On All Pins:
HBM..............................................................................3 kV
MM...............................................................................200V
DC CHARACTERISTICS
† Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational sections of this specification is not intended.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
Electrical Characteristics: Unless otherwise indicated, V_IN = 3.6V, C_OUT = C_IN = 4.7 µF, L = 4.7 µH,
V_OUT(ADJ) = 1.8V, I_OUT = 100 mA, T_A = +25°C. Boldface specifications apply for the T_A range of -40^oC to +85^oC.
Parameters
Sym Min Typ Max Units
Conditions
Input Characteristics
Input Voltage
V_IN
2.7 — 5.5
Maximum Output Current
I_OUT
500 —
—
Shutdown Current
I_{IN_SHDN} —
0.05
1
Quiescent Current
I_Q
—
45
60
Shutdown/UVLO/Thermal Shutdown Characteristics
V Note 1
mA Note 1
µA SHDN = GND
µA SHDN = V_IN, I_OUT = 0 mA
SHDN, Logic Input Voltage Low
V_IL
—
SHDN, Logic Input Voltage High V_IH
45
SHDN, Input Leakage Current V_{L_SHND} -1.0
Undervoltage Lockout
UVLO 2.40
Undervoltage Lockout Hystere- UVLO_HYS —
sis
—
—
±0.1
2.55
200
15
—
1.0
2.70
—
%V_IN
%V_IN
µA
V
mV
V_IN = 2.7V to 5.5V
V_IN = 2.7V to 5.5V
V_IN = 2.7V to 5.5V, SHDN = A_GND
V_IN Falling
Thermal Shutdown
T_SHD
— 150 —
Thermal Shutdown Hysteresis T_SHD-HYS —
10
—
Output Characteristics
°C Note 5, Note 6
°C Note 5, Note 6
Adjustable Output Voltage
Range
V_OUT
0.8
—
4.5
V Note 2
Reference Feedback Voltage
V_FB
— 0.8 —
V
Feedback Input Bias Current
I_VFB
— -1.5 —
nA
Note 1: The minimum V_IN has to meet two conditions: V_IN ≥ 2.7V and V_IN ≥ V_OUT + 0.5V.
2: Reference Feedback Voltage Tolerance applies to adjustable output voltage setting.
3: V_R is the output voltage setting.
4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load
regulation is tested over a load range of 0.1 mA to the maximum specified output current. Changes in
output voltage due to heating effects are covered by the thermal regulation specification.
5: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
temperature and the thermal resistance from junction to air (i.e. T_A, T_J, θ_JA). Exceeding the maximum
allowable power dissipation causes the device to initiate thermal shutdown.
6: The internal MOSFET switches have an integral diode from the L_X pin to the V_IN pin, and from the L_X pin
to the GND pin. In cases where these diodes are forward-biased, the package power dissipation limits
must be adhered too. Thermal protection is not able to limit the junction temperature for these cases.
7: The current limit threshold is a cycle-by-cycle current limit.
DS22061A-page 4
© 2007 Microchip Technology Inc.